to think better of

listen to the pronunciation of to think better of
English - English
change one's opinion on something positively
To change one's mind concerning, especially to decide against

He got halfway out the door, thought better of it, and decided to stay home, instead.

Change your mind about; to consider again and make a better decision about. "John told his mother he wanted to leave school, but later he thought better of it."
think well of, regard favorably; change one's mind, rethink