If Jesus is the Author & Finisher of our faith Heb.12:2 , the Beginning & End, the Alpha & Omega (Rev.1:8), the only way to the Father & heaven (Jn.14:6), then we really need to know who is Jesus if we don’t want to fall into the deception of false religions or cults.
“But I fear that somehow, as the serpent deceived Eve through his trickery, so your minds might be led astray from the simplicity that is in Christ. 4 For if he who comes preaches another Jesus, whom we have not preached, or if you receive another spirit,. . .” 2 Cor.11:3-4