When the king of Egypt was told that the people were gone, he and his servants changed their minds. They said, "What have we done, letting Israel, our slave labor, go free?" Exodus 14:5 (MSG)
The origin of the word "repentance" alludes to the idea of turning and moving in the opposite direction. Repentance is generally a good thing. God calls us to repent. There are crucial times in life when we "repent" of bad actions, habits or thoughts and start moving in the opposite direction. We are like Pharaoh, who after much prodding and suffering negative consequences, relent and choose to do the right thing.
I don't know about you, but I can also look back and see that I, like Pharaoh, will often quickly second guess my repentance:
"I can't believe I said I'd start eating healthier today. Look at that plate of cookies. I'll start tomorrow instead."
"Why did I tell myself I was going to work out today? The big game is on and I just don't have the energy."
"What was I thinking saying I'd be nicer to him. He was such a jerk to me. Forget that!"
Let's not, like Pharaoh, repent of our repentance and reverse course back to old ways.