Today:

I am grateful for our human ability to forgive. And the quality of trust that is built following that genuine interaction.

In the show, Battlestar Gallactica, I think it was best expressed it in this interaction between two characters:

(Athena - who had been an entrusted member of the military for years, was found out as a sleeper agent. She then committed acts of treason against her commanders, and her people and was charged for attempted murder of her superior. Her loyalty confused and blurred, she became an outcast and prisoner. Eventually, through many acts of proving herself loyal, and by the kindness and understanding of the commander in chief (the attempted murder victim), she was re-instated as a Lieutenant and sent on a mission in which the lives of many were in her hands.)

Before going off on this mission, she asked:
Lt. Athena: How do you know? I mean, how do you really know that you can trust me?
Admiral Adama: I don't. That's what trust is.