I was angry with my friend: I told my wrath, my wrath did end. I was angry with my foe: I told it not, my wrath did grow.

— Blake, William

Those who are free of resentful thoughts surely find peace.

— Buddha

In ceremonies of the horsemen, even the pawn must hold a grudge.

— Dylan, Bob

To have a grievance is to have a purpose in life.

— Hoffer, Eric

You gave him an opportunity of showing greatness of character and he did not seize it. He will never forgive you for that.

— Nietzsche, Friedrich

Resentment or grudges do no harm to the person against whom you hold these feelings but every day and every night of your life, they are eating at you.

— Peale, Norman Vincent

Resentment is weak and lowers your self-esteem.

— Sher, Barbara