Question

What to reply __ Man propses god disposes

Answer 1

Explanation:

This phrase means that not everything goes as planned by a person all the time. Sometimes, a man wants to do something but cannot do it because god had other plans and stopped him.

So, I dont know the context for your reply, but usually it just means that "its alright, you can't have everything you want, and you should not think too much about it or feel bad. You should move on."

Then you can just say "Its true" or "I agree"