Thou -- The  "you" here in the second-person pronoun in form of a singular subject. When it has no verb, the verb "is" or the previous verb is assumed. When it has a verb, the subject of the sentence is part of the verb, its explicit use repeats the idea of who is speaking, "you." Saying "you yourself" captures this feeling in English.

missing "yourself" -- (MW)  The subjective pronoun repeats the information in the verb so it should be repeated in English like "you yourself."

sayest -- The word translated as "say" is the most common word that means "to say," "to tell," and "to speak,"  but when used with an objective noun or pronoun, the sense is "say of" or "speak of."  When two accusative objects are used, the sense is  "say of him this," or "call him this." The form Jesus uses to describe his own speaking can be either indicative, "I say/tell" or subjunctive, "I should/could say/tell."  It also has many ancillary meanings such as "to count" ("to number" or like we might say, "to recount" a story) or "to choose for yourself."

that -- (CW) The word translated as "that" introduces a statement of fact or cause, "for what," "because," "since," and "wherefore." Jesus usually uses this word to mean "because."

I -- The pronoun "I" is used here.  When it has no verb, the verb "is" or the previous verb is assumed. When the subject of the sentence is part of the verb, this pronoun accentuates who is speaking "I." Saying "I myself" captures this feeling in English.

missing "myself" -- (MW)  The subject pronoun repeats the information in the verb so it should be repeated in English like "I myself."

am  - The verb "am" here is the common form of "to be" in Greek. It means to have a certain characteristic or remain in a certain condition. It also equates terms or assigns characteristics.  The word also means "to exist" and where it doesn't connect to characteristics or conditions.

a -- There is no indefinite article in Greek, but when a noun doesn't have a definite article, the indefinite article can be added in English translation.

king. -- "King" is translated from a Greek word which means a "king" or "chief."

To -- The word translated as "to" means "into" a place, "towards" as a direction, "as much as (of measure or limit)," "in regards to" a subject,"up to" limits in time and measure, and "for" a purpose or object.

this -- The word translated as "this" means "from here" "from there" or "this/that thing/person here/there." It often comes after the noun, emphasizing it, with the sense of "this one."

end-- (IW) There is nothing that can be translated as "end" in the Greek source. 

was -- (WT) This helping verb "was" indicates that the verb is passive. Helping or auxiliary verbs are needed to translate the Greek verb forms into English. The tense is not the simple past, but the past perfect, "have been born."

I -- This is from the first-person, singular form of the verb.

born, -- The word translated as "born" means "to become," that is, to enter into a new state. In Greek, especially as used by Jesus, it is the opposite of "being," which is existence in the current state. When applied to events, this word means "to happen," "to occur," or "take place." For things, it can be "to be produced." When the participle takes a predicate, the sense is "coming into" something.

and -- The Greek word translated as "and" is used as the conjunction "and," but it also is used to add emphasis ("also"). In a series, it can be translated as "not only...but also." After words implying sameness "as."

for -- The word translated as "for" means "into" a place, "towards" as a direction, "as much as (of measure or limit)," "in regards to" a subject,"up to" limits in time and measure, and "for" a purpose or object.

this -- The word translated as "this" means "from here" "from there" or "this/that thing/person here/there." It often comes after the noun, emphasizing it, with the sense of "this one."

cause -- (IW) There is nothing that can be translated as "cause" in the Greek source. 

came -- (WT) The word translated as "came" primarily means "to start out" but Christ usually uses it to mean "come" but not always. It indicates movement, especially its beginning, without indicating a direction toward or away from anything, so it works either as "start," "come," or "go," but it is more like our phrase "being underway." Our English word "show up" captures both the "start" and "come" ideas. See this article for more.The tense is not the simple past, but the past perfect, "have been born."

I-- This is from the first-person, singular form of the verb.

into -- The word translated as "unto" means "into" a place, "towards" as a direction, "as much as (of measure or limit)," "in regards to" a subject,"up to" limits in time and measure, and "for" a purpose or object.

the -- The word translated as "the" is the Greek definite article; without a noun, it has the sense of "the one." The Greek article is much closer to our demonstrative pronouns ("this," "that," "these," "those") than the English "the." See this article for more. 

world, -- Jesus uses the word translated as "world" to mean "the world order," and "civilization," specifically its "rulers," or its organization. Today, we use the word "society" or "regime" in this sense. More about this word in this article about related words.

that -- The word translated as "that" is a conjunction that starts a subordinate clause  "that," "when," "in order that" "when," or "because." It is used as an introduction to a command, where it isn't translated. -- The word translated as "there" is an adverb "in that place," "there," "where," or "when."

I-- This is from the first-person, singular form of the verb.

should -- This helping verb in English comes from the form of the Greek verb that indicates a possibility. We would usually say "might" or "should" in English.

bear witness -- "Bear witness" is the Greek verb that means "to give testimony" and "to bear witness." It has the sense of being true testimony. It is the verb form of the Greek word for "testimony" and "proof," which is the source of our word "martyr."

unto -- This word "to" comes from the dative case of the following word that requires the addition of a preposition in English. The most common is a "to" for the English indirect object.

the  -- The word translated as "the" is the Greek definite article; without a noun, it has the sense of "the one." The Greek article is much closer to our demonstrative pronouns ("this," "that," "these," "those") than the English "the." See this article for more. 

truth. .-- The literal meaning of the Greek word for "truth" is "not hidden," and it means what is real as opposed to how things seem. Applied to people, it means "truthfulness" and "sincerity." The opposite of a lie or appearance.

Every -- The word translated as "every" is the Greek adjective meaning "all," "the whole," "every," and similar ideas. When it is used as a noun, we would say "everything." As an adverb, it means "in every way," "on every side," and "altogether."

one  --  The word translated as "one" is the Greek definite article. When not preceding a noun, takes the meaning of "the one" or, in the plural, "the ones." The Greek article is much closer to our demonstrative pronouns ("this," "that," "these," "those") than the English "the." See this article for more. 

that -- (IW) There is nothing that can be translated as "that" in the Greek source. It was added because the next verb was translated as active rather than as a participle.

is--  (WF) The verb "is" here is the common form of "to be" in Greek. It means to have a certain characteristic or remain in a certain condition. It also equates terms or assigns characteristics.  The word also means "to exist" and where it doesn't connect to characteristics or conditions. With the genitive object, the sense is "belongs to." With an indirect object, it means "have" where the subject and object are reversed. -- When the verb "to be" appears early in the clause before the subject, the sense is more like "it is" or, in the plural, "there are."

of -- (CW) The Greek preposition translated as "of" means "out of" or "from." The word also means "beyond," "on," "in," "since," or "by"based upon its context. However, in Greek, they use the genitive case instead of a preposition for the types of phrases that are translated into English "of" phrases.

the -- The word translated as "the" is the Greek definite article. When not preceding a noun, takes the meaning of "the one" or, in the plural, "the ones." The Greek article is much closer to our demonstrative pronouns ("this," "that," "these," "those") than the English "the." See this article for more.

truth -- The literal meaning of the Greek word for "truth" is "not hidden," and it means what is real as opposed to how things seem. Applied to people, it means "truthfulness" and "sincerity." The opposite of a lie or appearance.

heareth -- "Hear" is from a Greek verb that means "to hear" and "to listen." It has the same sense as the English not only of listening but of understanding.   It also means "to listen" and "to understand," but amusingly, it also means "to be silent." The accusative object is the person/thing heard about, while the genitive is the person/thing heard from.  However, two genitives can be used with the sense of "hear of a thing from a person."

my -- "My" is the first-person possessive singular pronoun. This pronoun follows the noun so "of mine."  As a genitive object of a preposition, as here, it means movement away from something or a position away from something else.

missing "the/this"  -- (MW) The untranslated word is the Greek definite article," the," which usually precedes a noun and, without a noun, takes the meaning of "the one." The Greek article is much closer to our demonstrative pronouns ("this," "that," "these," and "those"). See this article for more. 

voice. -- -- The noun translated as "voice"  means "sound", "speech", "voice",  "cry" [of animals], "sounds" [of inanimate objects], and "report."