bible.com/bible/107/psa.42.11.NET
In this psalm It is as if David, were looking at his reflection in a mirror asking himself why are you worried you have God on your side? Then saying to himself I will wait for God and I will give God glory for what he will do. For I believe in God.
Do this today look in the mirror tell yourself that you will trust in God and Jesus, tell your soul to stand up and to stop looking down for the Lord your God is worthy to be praised. So let it be written on your heart so let it be done. Which by the way is what Amen means of course I added on your heart but I believe it works better this way.