Are there limits to free will?

Our human brains have evolved various different circuitries. One is the ability to forgive. However, can we forgive someone who

has not apologized, offered to make amends, or changed her ways?

Forgiving that person is much harder than

when the offender has admitted fault, apologized, offered to compensate you, promised to refrain from harming you in the same way again, and continued to make good on that promise day in and day out.

Michael McCullough examines the subject in an essay here.