There is something missing from your statement.  You use the word "that" but you don't say what "that" is.  So I can not understand what you want to say. If you try again, I will see what I can do to help you.

Food for the brain  or  Food for thought

A food for brain.

Our happiness only depends on that (what?) if we use all chances for it reaching (I don't know what you are trying to say). Could you say it like this ?