lit. If three walk together, one should be my teacher (idiom, from Confucian analects). You have sth to learn from everyone.
also translated as: If three of us walk together, at least one of the other two is good enough to be my teacher.
lit. When we get to the mountain, there'll be a way through. (idiom)
fig. Everything will turn out for the best.
Let's worry about it when it happens.
It will be all right on the night.
cf couplet 車到山前必有路,船到橋頭自然直|车到山前必有路,船到桥头自然直