We all have those moments when we excuse sin.
It goes somewhat like this
step 1: We know something is wrong
step 2: We want to continue in our ways
step 3: We justify the sin so we don't feel so bad and we proceed
step 4: We acknowledge we were wrong and repent.
or do we stop at step 3?
Sin cannot be explained away, excused or tolerated.
We will mess up but we don't practice accidents. When we do mess up God will forgive us but we continue to strive for what is good, what is pure and what is God's way.