God is always with us. But we are not always with Him. We forget that He is always with us. When we forget that He is with us and is watching us, then we commit sins. For example, as soon as we spot a policeman or speed camera and we are over-speeding, we slow down. Similarly, we go to the temple and listen to Katha to get the realisation that God is always with us and He is watching us every moment and cares for us every moment. So this should help us to think of Him and be with Him all the time.