Reaching our full potential requires discipline. In the case of the poet, Rilke tells him that learning to be in solitude is crucial to becoming a great writer. He has to learn to be alone if he wants to be a great writer. Many of us have disciplines that we must accomplish to reach our full potential, but it is never easy. I know I many times feel like the young poet:

“I don’t want you to be without a greeting from me when Christmas comes and when you, in the midst of the holiday, are bearing your solitude more heavily than usual. But when you notice that it is vast, you should be happy; for what (you should ask yourself) would a solitude be that was not vast; there is only one solitude, and it is vast, heavy, difficult to bear, and almost everyone has hours when he would gladly exchange it for any kind of sociability, however trivial or cheap, for the tiniest outward agreement with the first person who comes along, the most unworthy. . . . But perhaps these are the very hours during which solitude grows; for its growing is painful as the growing of boys and sad as the beginning of spring. But that must not confuse you. What is necessary, after all, is only this: solitude, vast inner solitude. To walk inside yourself and meet no one for hours – that is what you must be able to attain.

And you should not let yourself be confused in your solitude by the fact that there is something in you that wants to move out of it. This very wish, if you use it calmly and prudently and like a tool, will help you spread out your solitude over a great distance. Most people have (with the help of conventions) turned their solutions toward what is easy and toward the easiest side of the easy; but it is clear that we must trust in what is difficult; everything alive trusts in it, everything in Nature grows and defends itself any way it can and is spontaneously itself, tries to be itself at all costs and against all opposition. We know little, but that we must trust in what is difficult is a certainty that will never abandon us; it is good to be solitary, for solitude is difficult; that something is difficult must be one more reason for us to do it.”