Psalm 4

David reminds he readers to meditate on God's word, even as we lie down to rest. We need to keep God's word near to us so that his word will be our ready defense against the temptations to give up on God. His provisions for a situation are not always physical or emotional. Sometimes all that he gives us to work through a struggle is his promises. That is normally not what we want. But David points out that with God's promises he was able to lie down at night; to meditate and to get the rest that he needed. We can do the same.
Stuart