What Does It Mean To Repent?

A man walked into a bank, handed the teller a threatening note and walked out with a bag of money containing more than $3,000.  The man was never caught, but the whole thing has authorities baffled.  It began a few months later when the bank received an envelope which had been mailed from a distant city containing a cashier's check in the name of a Mister R.E. Morse as in the word "remorse."  Along with one of the checks was the following note: "My faith in Christ as my Savior has impelled me to undertake this reimbursement and I hope to be able to pay it off within six months."