This is one of several psalms that speak firmly of a trust in God that enables them to face life without fear despite its very real dangers (vv. 2-3). Paul echoes the language of these psalms (which, of course, he prayed regularly) in his own confession of confidence ("If God is for us, who is against us?" Romans 8:31-39).
The psalm closes with a call to faithful waiting, based on trust in God: "Wait for the Lord; be strong, and let your heart take courage; wait for the Lord!" (v. 14). The poet knows that success and earthly blessing may not be seen in the moment but nevertheless is able to wait with other believers for God's deliverance, precisely because of their enduring faith in the goodness of God (v. 13).
1 The Lord is my light and my salvation;
whom shall I fear?
The Lord is the stronghold* of my life;
of whom shall I be afraid?
New Revised Standard Version Bible: Anglicized Edition, copyright © 1989, 1995 National Council of the Churches of Christ in the United States of America. Used by permission. All rights reserved worldwide. http://nrsvbibles.org