God's strategy is to give us enough for today and then, when tomorrow comes, to give us enough for that day too. Do you see how this is exactly what we need? Fears and worries live in the future, trying to assure a good outcome in a potentially hard situation. The last thing they want to do is trust anyone, God included. To thwart this tendancy toward independence, God only gives us what we need when we need it. The emerging idea is that he wants us to trust him in the future rather than our self-protective plans.
Ed Welch, taken from Running Scared.