5 Thomas said to Him, "Lord, we do not know where You are going, and how can we know the way?"
6 Jesus said to him, "I am the way, the truth, and the life. No one comes to the Father except through Me.
the way (v.6) — The way for sinners to be reconciled with God (Hebrews 10:20). The way to the Father's presence (vs.2-3)
the truth (v.6) — He is the living Word. To know Him is to know the truth and vice versa.
Man's truth (John 18:38; Romans 3:11). Christ's truth (Colossians 2:3)
the life (v.6) — He is the source and sustainer of all life.
Man's way (Romans 3:12)
The destination (vs.2-3) is the Father, and the way to that destination is Jesus Christ. (Acts 4:12; 1 Corinthians 3:11; 1 Timothy 2:6)
Before sin entered the world Adam enjoyed a threefold privilege in relation to God; he was in communion with his Maker; he knew Him, and he possessed spiritual life. But when he disobeyed and fell, this threefold relationship was severed. He became alienated from God, as the hidin gof himself painfully demonstrated; having believed the Devil's lie, he was no longer capable of perceiving the truth, as the making of fig leaf aprons clearly evidenced; and he no longer had spiritual life, for God's threat "In the day thou eatest thereof thou shalt surely die" was strictly enforced. in this same awful condition has each of Adam's descendants entered this world, for "that which is born of the flesh is flesh" — a fallen parent can beget nought but a fallen child. Every sinner, therefore, has a threefold need — reconciliation, illumination, regeneration. This threefold need is perfectly met by the Savior. He is the Way to the Father; He is the Truth incarnate; He is the Life to all who believe in Him. — Exposition of the Gospel of John, by Arthur W. Pink, pages 354-355.