What is the origin of the idiom "on second thoughts" and when to use it?

The idiom "on second thoughts" originated in the English language, but its specific origin is difficult to trace. It is a common expression used to convey the idea of reconsidering or revising one's initial thoughts or opinions. The phrase likely emerged from the natural tendency of individuals to reflect and reevaluate their perspectives after having some time to think or gather additional information. It is commonly used when someone reevaluates their initial thoughts, judgments, or decisions after further reflection or consideration.