Commit means to hand over, to trust wholly to another. So, if we give our trials to Him, He will carry them. If we walk in righteousness He will carry us through. "Humble yourselves, therefore, under the mighty hand of God that He may exalt you in due time." There are two hands there -- God's hand pressing us down, humbling us, and then God's hand lifting us up. Cast all your care on Him, then His hand will lift you up, exalt you in due time. There are two cares in this verse -- your care and His care. They are different in the original. One means anxious care, the other means Almighty care. Cast your anxious care on Him and take His Almighty care instead. Make no account of trouble any more, but believe He is able to sustain you through it. The government is on His shoulder. Believe that, if you trust and obey Him, and meet His will, He will look after your interests. Simply exchange burdens. Take His yoke upon you, and let Him care for you.