God already knows what is in our heart and mind, but for our own benefit, we must keep communicating with him to show that we trust in him and that we want to stay close to him. Therefore, it's good to turn to the Lord to let him see exactly what's in our hearts, our spiritual state, desires, wishes, concerns, our burdens and problems and everything else. The communication must be free, thorough, and heart-to-heart. Basically, you bare your soul to the Lord who loves you. If you make this your daily practice, you'll definitely experience his peace.