εἶ

The Greek word "ei" is a form of the verb "eimi," meaning "to be." In particular, "ei" is the second person singular present indicative active form, translating to "you are." This form is often used in direct address to affirm or declare someone's identity, status, or characteristic. It can also be found in conditional statements, where the "if you are..." construction sets up a potential scenario.

In the New Testament, "ei" frequently appears in significant theological pronouncements. It is often employed in declarations regarding the identity of Jesus, such as "Thou art the Christ" or "Thou art the Son of God." These statements are pivotal moments in the Gospels, highlighting the disciples' recognition of Jesus' divine nature and messianic role. It also occurs in divine pronouncements from heaven, confirming Jesus' sonship.

The word is straightforward in its lexical meaning, simply indicating existence or identity. Its theological weight, however, derives from the context in which it is used, especially when applied to figures like Jesus. The affirmations of "who you are" become confessions of faith or pronouncements of truth that shape the understanding of key biblical figures and events. Beyond theological contexts, "ei" is used in everyday conversation to describe a person's attributes or to pose questions about their status, just as in English.