How do we know that Jesus is the true vine?

Jesus's declaration of being the true vine is rooted in the broader context of His teachings about salvation and discipleship. He contrasts Himself with imitations and emphasizes that He alone provides the life-giving nourishment needed for spiritual growth. The imagery of the vine and branches illustrates that believers must remain connected to Jesus to bear fruit (John 15:4). Moreover, His perfection and sinlessness affirm that He is the only valid source of spiritual life, unattached to any imperfection or counterfeit elements.