Casting all your care upon him; for he careth for you.
1 Peter 5:7 (KJV)
To truly surrender all our cares to God we must understand how much He cares for us. The more we get a revelation of His perfect love for us, the more will we find ourselves at peace regardless of circumstances. When we receive the perfect love of Jesus we come to find rest in His finished works, trusting that He has already perfected all that concerns us.