Jesus died so the power of sin would not reign over us.
Acts 10:43 To him give all the prophets witness, that through his name whosoever believeth in him shall receive remission of sins.
1) release from bondage or imprisonment
2) forgiveness or pardon, of sins (letting them go as if they had never been committed), remission of the penalty
Forasmuch then as the children are partakers of flesh and blood, he also himself likewise took part of the same; that through death he might destroy him that had the power of death
This is a two fold word meaning past sins are forgiven and the slate is wiped clean.
and jesus died to destroy the power of sin over us. After jesus died his people were given the power to say no to sin. Our bondage or slavery to sin was ended and we can say no to sin before it happens.
As far as daily sinning goes
1 John 1:9 If we confess our sins, he is faithful and just to forgive us our sins, and to cleanse us from all unrighteousness.
We need to keep a contrite heart before God and earnestly desire our sins to be forgiven, realizing our pre-saved sins are gone but the ones we don`t know about or do need to be confessed to GOD not a catholic priest, so God will forget those too.