A beautiful cloud billows-changing color and yet we know it will vanish quickly. A human is born, has it's day in the sun and dies. A mountain range comes into being and is rubble 150 million years later. All contingent on the Creator.
God exist simply through His own Power. Is our world so anxious because we sense that we are like a fleeting flame that burns so brightly just to be blown out?
We try and alleviate our fears with pleasure, power, honor and wealth yet these things do not calm our fears for long. As St. Augustine said it so well 1,600 years ago..."Lord,you have made us for yourself, and our hearts are restless till they rest in thee."