expression
the proof of the pudding is in the eating; you can't tell unless you try
Proverb encouraging someone to try something before judging it; similar to 'don't knock it till you've tried it'.
この料理、見た目は変だけど、物は試しで食べてみて。
This dish looks weird, but the proof of the pudding is in the eating—give it a try.
新しい趣味を始めるか迷っているなら、物は試しだよ。
If you're unsure about starting a new hobby, you can't tell unless you try.