John 3:36

Whoever believes in the Son has eternal life; whoever does not obey the Son shall not see life, but the wrath of God remains on him.

Believing in Christ is equated with obeying Christ. Belief without obedience is not a saving belief, God's wrath still remains.

John 14:15 If you love me, you will keep my commandments.

Christ would have us know that loving him will cause us to keep his commandments, the soul that professes love without obedience is not truthful.

1 John 5:3 For this is the love of God, that we keep his commandments. And his commandments are not burdensome.

Commandment keeping must not be burdensome or it is not done in love. If we obey, but don't enjoy obeying, we haven't obeyed.