The mistake we make as mortals is that most of the time, we try to do things in our own limited strength and wisdom. We worry and stress about many things that are going on around us.
God commands us , his redeemed children to stop striving and let go of our worries and fears. His word says "not by might or by power but by my spirit". Zacariah 4.1
How do we let go and let God take full control over our lives. We need to acknowledge his sovereignty over our lives. We need to admit and accept our dependent on him for direction, wisdom, protection, seek spiritual strength from him. We need to put everything in his hand knowing that he knows and wants the best for us. God has promised us that " his plans for us , is not to harm us but to give us hope and a future" Jeremiah 29.11
God's word says "do not worry about anything but pray about everything , tell him what you need and not forgetting to thank him. Then you will experience God's peace, which exceeds anything we can understand" Philippians 4. 6-7.