Some of these verses especially with Paul is harder to understand sometimes its the way he speaks and other times its the translation being used. Why we should always reconcile his verses by context and the other Scriptures.
For example
Rom 10:4 For Christ
is the end of the law for righteousness to everyone who believes.
Many take this as the law ended, but if we look a bit more carefully the word for "end" means
έλος
telos
tel'-os
From a primary word τέλλω tellō (to set out for a definite point
or goal); properly the point aimed at as a limit, that is, (by implication) the conclusion of an act or state (termination [literally, figuratively or indefinitely], result [immediate, ultimate or prophetic], purpose); specifically an impost or levy (as paid): - + continual, custom, end (-ing), finally, uttermost. Compare G5411.
So the better translation is Christ is the goal of the law for righteousness as our righteousness is through faith. While our righteousness comes through faith, does that mean we should disobey God and His instructions for righteousness Psa 119:172 and depend on our own righteousness? Of course not.
Also the commandment to beleive in Jesus does not mean that's the only commandment as Jesus clearly taught
Mat 19:17 So He said to him, [
e]“Why do you call Me good? [
f]No one
is good but One,
that is, God. But if you want to enter into life,
keep the commandments.”
18 He said to Him, “Which ones?”
Jesus said, “‘You shall not murder,’ ‘You shall not commit adultery,’ ‘You shall not steal,’ ‘You shall not bear false witness,’ 19 ‘Honor your father and
your mother,’ and, ‘You shall love your neighbor as yourself.’ ”
And don't deceive oneself that just because the commandments that show us to love God and the greatest commandment to love God with all our heart is not mentioned here, does not mean we do not need to keep. If one of the greatest commandment is mentioned it means both, if one of the Ten Commandments is mentioned it means all James 2:11
Mat 5:19 Whoever therefore breaks one of the least of these commandments, and teaches men so, shall be called least in the kingdom of heaven; but whoever does and teaches
them, he shall be called great in the kingdom of heaven.
If we beleive in Jesus we need to beleive His teaching or be live them as He instructed quoting OT
Mat 4:4 But He answered and said, “It is written, ‘Man shall not live by bread alone,
but by every word that proceeds from the mouth of God.’ ”