Isaiah 26:3-4 (Amplified Bible)

3You will guard him and keep him in perfect and constant peace whose mind [both its inclination and its character] is stayed on You, because he commits himself to You, leans on You, and hopes confidently in You.

4So trust in the Lord (commit yourself to Him, lean on Him, hope confidently in Him) forever; for the Lord God is an everlasting Rock [the Rock of Ages].

There is something marvelous about trusting God…it removes the necessity of worrying about stuff.