면 알다

you'll find out once you try

An assurance: do the thing and the answer will be obvious to you. 드셔보면 알아요 'taste it and you'll see', 일단 들어보시면 압니다 'once you listen, you'll understand.' Half these lines pair it with 보다 'try', so it usually promises first-hand proof rather than an explanation. Watch out for the unrelated word 아니면 'or else', which contains the same letters and turns up in one line here without being this pattern at all.