(adjective) (of a person, an action, etc.) Lacking good sense or judgement; unwise.
"A foolish faith in authority is the worst enemy of truth."
"First love is only a little foolishness and a lot of curiosity."
"Foolishly hoping you return with a kiss."
"Just in case you ever foolishly forget; I'm never not thinking of you."
"Life has its own lesson on our foolishness."