Man was designed in a way in which he must eat in order to give him a solid reason to go to work everyday. This helps to keep him out of trouble. God is wise.
Everyone has a sense of humor. If you don't laugh at jokes, you probably laugh at opinions.
For God to prove himself on demand, physically, would be a grave disappointment, and the strongest Christians should be considerably grateful that he chooses not to do so. The skeptic endlessly demands proof, yet God refuses to insult the true intelligence of man, the '6th sense', the chief quality, the acumen which distinguishes man from the rest of creation, faith.