You shall not hate your brother in your heart. You shall surely rebuke your neighbor, and not bear sin because of him. You shall not take vengeance, nor bear any grudge against the children of your people, but you shall love your neighbor as yourself: I am the Lord.
We've covered over sin with a false unscriptural notion that God's love is unconditional, so we don't need to be serious about it unless it's some kind of gross sin.
Have you been casual about your sin due to this faulty thinking?