Grace is available to the repentant. Every day grace is available to the every day repentant. Repentance is a daily discipline, not a one time shot. Each day we should ask that God search our hearts and reveal any wickedness, injustice, or lack of integrity within us. When he reveals those things to us, which is inevitably present, we must repent of those things. We cannot then avoid what we know is there.
Psalm 7:12-16 reveals the self-inflicted pain and consequence for the person who refuses to repent. Its like he has dug his own inescapable hole to fall into.
We are to repent, and when God answers with mercy and ridiculous grace, we must give thanks and never take it for granted, even with every day repentance.