"Now faith is being sure of what we hope for and certain of what we do not see." (Hebrews 11:1)
This is a good verse to carry us over in those difficult times when we have trouble sensing God's presence in our lives. It is a real comfort, knowing that we can rely on God even when we can't "see" him in our situation. God promised that he would never leave us nor forsake us, so even in those times when we feel totally alone, we can be assured that God is still with us. He still loves us, no matter what, and even when we walk away from him (spiritually speaking), he still is trying to draw us back to him.