The Bible Teaches:
22. For the Father judges no man, but has committed all judgment unto the Son:
23. That all men should honor the Son, even as they honor the Father which hath sent him.
24. Verily, verily, I say unto you, He that hears my words, and believes on Him that sent me, has everlasting life, and shall not come into condemnation, but has passed from death unto life.
John 5:22-24
Here, we are told that the Father has committed all judgment to the Son, and that the deciding factor in that judgment will be whether nor not we honor the Son. Throughout Scripture, we are told that the sole condition for eternal life is to believe on the Lord Jesus Christ. We see from the context that these are not different messages, but the same message. If we believe that the Father has sent the Son to die in our place, and that eternal life is a gift by his grace, we honor the Father, and we honor the Son.
Grace, by its nature, has five elements: the gift, the giver, the disposition of the giver to freely bestow the gift, a subject upon whom the gift is bestowed, and the acceptance of the gift by that subject. If we accept the gift, we honor the grace of the giver, the grace of our Sovereign. We do this when we believe on the Son as the one who has died for our sins, and who provides eternal life freely by his grace.
But if we should not accept his grace, we dishoner Him. Some refuse His grace by demanding they are not worthy of death. And by their refusal, they dishnor the Son, and stand under his condemnation. Some refuse his grace because they refuse to believe that the Son has died for their sins. And so they dishonor the son, trivializing the expense he bore to provide us that eternal life freely.
Eternal life is the gift of God. Those who honor the Son will accept his gift. Those who will not believe His offer of eternal life reject His gift, and dishnor their Sovereign.
Those who believe not dishonor the Son. And those who dishonor the Son stand condemned already, for they have believed not in the name of the only begotten Son of God.
(John 3:18)