“Blessed is the man who trusts in the Lord, whose trust is the Lord.”
Verse 5 says this, “Cursed is the man who trusts in man and makes flesh his strength.”
Many people have an initial tendency to try and do things on their own. Their first inclination is to rely on their own strength and wisdom. It isn’t until everything is falling apart and they are forced to their knees that they look up.
Being faithful means going directly to God with your troubles. He is the first thought that crosses your mind when you need help. Blessings come to those who have faith and rely on the Father!