Silence never means that God is not there. He, of course, is always there. Silence is a test of obedience. It is an indication from God that it is now your turn to make the next move. A move, not based on the easy comfort of His overpowering presence, or the renewed leading of His Spirit, but rather, a move based on your already sufficient knowing of His will. The reason He does not speak is because He has already spoken. Silence means that you already know enough, and that it is time to finally act.