for (intended to belong to) / for, in aid of (intended to benefit, cure, support, etc.) / for (in return for) / to / for the sake of

(idiomatic) for a change (wishing for something new)

(colloquial, idiomatic) for show

(colloquial, idiomatic) as a disguise (so as to cover one's tracks to avoid recognition)

(colloquial, idiomatic) for show (done in a way to impress, as opposed to actually be useful)

(art, idiomatic) art for art's sake

(idiomatic) where there is a will there is a way

(idiomatic) your wish is my command

why

therefore, that's why