John Piper on Prayer (from Desiring God)

God is not looking for people to work for Him, so much as He is looking for people who will let Him work for them...He will not surrender the glory of being the Giver. But is there anything we can give Him that won't belittle Him to the status of beneficiary? Yes - our anxieties. It's a command: "Cast all your anxieties on Him" (1 Peter 5:7). God will gladly receive anything from us that shows our dependence and His all-sufficiency