"Be still in the presence of the Lord, and wait patiently for him to act."
How profound this little part of a verse is. If we are STILL in God's presence, we not only diminish worry and fear, but we also grow closer to God KNOWING that He will act.
Later in the chapter (verse 18), "Day by day the Lord takes care of the innocent, and they will receive an inheritance that lasts forever."
When we have a blameless heart before God, He's promised us that He will take care of us day by day. It's that simple.
Just BE STILL and KNOW that He is GOD.