For unto thine eyes art words heretofore given
Thou is a second-person singular pronoun. Thou thou is the nominative form. It becomes “you” in modern English. Whereas in, say, The King James version of the Bible, it is the you the speaker is addressing.
For more on pronoun cases, see the Early Modern English Prououn Table.
Early Modern English had some great words that are still fun to use today. Here is a table of the pronouns from that period and how, when, and where to correctly use them.
| Nominative | Oblique | Genitive | Possessive | ||
|---|---|---|---|---|---|
| 1st person | singular | I | me | my/mine | mine |
| plural | we | us | our | ours | |
| 2nd person | singular informal | thou | thee | thy/thine | thine |
| singular formal | ye, you | you | your | yours | |
| plural | |||||
| 3rd person | singular | he/she/it | him/her/it | his/her/his (it) | his/hers/his |
| plural | they | them | their | theirs | |