The following is an excerpt from a Course in Miracles. It has such a powerful message

Be not content with littleness. But be sure you understand what littleness is, and why you could never be content with it. Littleness is the offering you give yourself. You offer this in place of magnitude, and you accept it. Everything in this world is little because it is a world made out of littleness, in the strange belief that littleness can content you. When you strive for anything in this world in the belief that it will bring you peace, you are belittling yourself and blinding yourself to glory. Littleness and glory are the choices open to your striving and your vigilance. You will always choose one at the expense of the other.

Yet what you do not realize, each time you choose, is that your choice is your evaluation of yourself. Choose littleness and you will not have peace, for you will have judged yourself unworthy of it. And whatever you offer as a substitute is much too poor a gift to satisfy you. It is essential that you accept the fact, and accept it gladly, that there is no form of littleness that can every content you. You are free to try as many as you wish, but all you will be doing is to delay your homecoming. For you will be content only in magnitude, which is your home.

There is a deep responsibility you owe yourself, and one you must learn to remember all the time. The lesson may seem hard at first, but you will learn to love it when you realize that it is true and is but a tribute to your power. You who have sought and found littleness, remember this: Every decision you make stems from what you think you are, and represent the value that you put upon yourself. Believe the little can content you, and by limiting yourself you will not be satisfied. For your function is not little, and it is only by finding your function and fulfilling it that you can escape from littleness.

Excerpt from A Course in Miracles