True

There are both true and false statements in your comments.

True
God is merciful or Jesus blood covered sins.

False
We can do whatever we want to.

Our best is never enough. We will fail any righteousness test. Although God is merciful, he is also just and requires payment for sins. Jesus makes that payment in his death on the cross.

A saved believer in Christ does not do whatever he wants, he does what God wants.