Nothing in this world is given. It is earned with hardwork and discipline.
You must deal with past regrets and mistakes before it eats you up from inside out. The pain will be there forever and you must deal with the pain.
When a person's confidence or hope is dashed, when he loses his will to fight, then he is truly useless.

Lord, help me live with my past.
Lord, pick me up when I no longer have the will to fight.
Lord, help me be faithful to you through my dark times.

Why are you downcast, O my soul?
Why so disturbed within me?
Put your hope in God,
for I will yet praise him,
my Savior and my God