How could I know God?

You have to do service for others. The block to God is the ego. The only way to get rid of the block is by doing things that are the opposite of self centeredness. The desire to receive knowledge is itself an ego desire. When you get beat up enough that you stop thinking of the self and start giving, then you realize that god was there all along. I don't claim to be good at this or to know god better than you or anybody else but that is the thing that I have found that helps to know god.