You are looking outside, and that is what you should most avoid right now. No one can advise or help you—no one. There is only one thing you should do. Go into yourself. Find out the reason that commands you to write; see whether it has spread its roots into the very depths of your heart; confess to yourself whether you would have to die if you were forbidden to write. This most of all: ask yourself in the most silent hour of your night: must I write? Dig into yourself for a deep answer. And if this answer rings out in assent, if you meet this solemn question with a strong, simple “I must”, then build your life in accordance with this necessity; your whole life, even into its humblest and most indifferent hour, must become a sign and witness to this impulse. Then come close to Nature. […] A work of art is good if it has arisen out of necessity. That is the only way one can judge it. So, dear Sir, I can’t give you any advice but this: to go into yourself and see how deep the place is from which your life flows; at its source you will find the answer to, the question of whether you must create. Accept that answer, just as it is given to you, without trying to interpret it. Perhaps you will discover that you are called to be an artist. Then take that destiny upon yourself, and bear it, its burden and its greatness, without ever asking what reward might come from outside. For the creator must be a world for himself and must find everything in himself and in Nature, to whom his whole life is devoted.
Rainer Maria Rilke, Letters to a Young Poet