Sark and Vaughn in “A Man of His Word”

Sark

I gave you my word, Mr. Vaughn. Am I to take it that you don't trust me?

Vaughn

You're about to betray one of your former partners; it doesn't really instill faith in your loyalty.

Sark

My past infidelities are just that; mistakes I've learned from... repented for. I've become a trustworthy man.