"Once something has outlived its usefulness in..." - Quote by Guy Finley
Once something has outlived its usefulness in one area of life, its purpose for being in existence is no longer the same. The leaf that captures a stream of sunlight, and then transfers its energy to the tree, serves one purpose in the spring and summer, and another completely different one through the fall and winter.
An image illustrating the quote: "Once something has outlived its usefulness in one area of life, its purpose for ..."