No one is sinless! Sin is mortal sin and venial sin. To be saved we must repent and confess our mortal sin and also our venial sin. Heaven accepts no mortal sinner, only venial sinners!
A Christian must exceed the symmetric justice of the Pharisees. He must love those who do not love him, do good to those who do not do him good, lend to those who do not lend to him.