“Jesus Christ—Messiah—the Way, the Truth, and the Life.”
[Line 2 from “Morning Prayer”]
Christ has the same meaning as messiah so when we say “Jesus Christ” we are also saying “Jesus, the Messiah” or “Jesus Messiah.” Messiah is a Hebrew word meaning “anointed one” and applied to anyone who was specially designated for a particular task or role, such as a king or priest.
So, in the Old Testament way of thinking messiah was an adjective — describing certain people and the task they were given — but in the New Testament Messiah comes to be used as a proper noun — “the Messiah” or “the Christ.” — describing the person, the work, and the purpose of Jesus, the anointed one. In Jesus, the long-held hopes of the Old Testament people of God are realized.
In the book of Psalms alone we see this played out time and time again.
Let the light of your face shine on us (Ps 4:6)
Look on me and answer, LORD my God. Give light to my eyes, or I will sleep in death (Ps 13:3)
As for God, his way is perfect; the LORD’s work is flawless; (Ps 18:30)
For I have kept the ways of the LORD (Ps 18:21)
You, LORD, keep my lamp burning; my God turns my darkness into light. (Ps 18:28)
Show me your ways, LORD, teach me your paths, guide me in your truth and teach me (Ps 25:4-5)
Send me your light and your faithful care, let them lead me (Ps 43:3)
Never take your word of truth from my mouth (Ps 119:43)
The LORD is near to all who call on him, to all who call on him in truth (Ps 145:18)
Much like the adjective messiah became a proper noun in Jesus, these three “lowercase” nouns describing three things that come from God — way, truth, life — become “uppercase” proper nouns in Jesus.