Here is a brief passage from Meditations by the Roman emperor-philosopher Marcus Aurelius that illustrates what we lose by surrendering to discomfort (of which is no concern to him) and not taking steps toward what we want in life:
At dawn, when you have trouble getting out of bed, tell yourself: “I have to go to work—as a human being. What do I have to complain of, if I’m going to do what I was born for—the things I was brought into the world to do? Or is this what I was created for? To huddle under the blankets and stay warm?