Titus 3:8 This is a faithful saying, and these things I want you to affirm constantly, that those who have believed in God should be careful to maintain good works. These things are good and profitable to men.
When God changes our heart we need to be prepared for a different life with Him in our heart.
He will constantly encourage us to turn away from our old ways and embrace His ways, the ways of righteousness that he has taught from the beginning.
He taught us these ways because they are good and profitable for us to follow; unlike the ways of the world which offer short term gratification only.