Tia Dalma

— You know of Davy Jones, yes? A man of the sea. A great sailor, until he run afoul of that which vex all men.
— What vexes all men?
— What indeed?
— The sea.
— Sums.
— The dichotomy of good and evil.
— A woman.

For what we want most there is a cost must be paid in the end.

— The song has already been sung. The Brethren Court is called.
— Leave you people alone for a minute, look what happens. Everything's gone to pot.

I will be free. And when I am, I will give you my heart and we will be together always. If only you had a heart to give.

— And what of your fate, Davy Jones?
— My heart will always belong to you.

— He fell in love.
— No, no, no, no. I heard it was the sea he fell in love with.
— Same story, different versions, and all are true. See, it was a woman as changing and harsh and untamable as the sea. Him never stopped loving her. But the pain it cause him was too much to live with but not enough to cause him to die.
— What exactly did he put into the chest?
— Him heart.
— Literally or figuratively?
— He couldn't literally put his heart in a chest.
— Could he?
— It was not worth feeling what small, fleeting joy life brings. And so him carve out him heart, lock it away in a chest and hide the chest from the world. The key he keep with him at all times.

You have corrupted your purpose, and so yourself.