Psalms 91 the writer shares an exhortation to them that feels tossed to and from by the variegating challenges of life. It is most common to be overcome with anxiety when life's challenges compound themselves. Jesus says in John 14 to ,,,let not you heart be troubled, however, Job declared that man born of woman is of few days and full of trouble. So then the challenge is, to have trouble but not allow it in our heart. David's advice is, if we dwell (settle our hearts) in the secret place of the almighty God, we can abide in a place of peace.