There is only one way: Go within. Search for the cause, find the impetus that bids you write. Put it to this test: Does it stretch out its roots in the deepest place of your heart? Can you avow that you would die if you were forbidden to write? Above all, in the most silent hour of your night, ask yourself this: Must I write? Dig deep into yourself for a true answer. And if it should ring its assent, if you can confidently meet this serious question with a simple, "I must," then build your life upon it. It has become your necessity. Your life, in even the most mundane and least significant hour, must become a sign, a testimony to this urge.
Then draw near to nature. Pretend you are the very first man and then write what you see and experience, what you love and lose. Do not write love poems, at least at first; they present the greatest challenge. It requires great, fully ripened power to produce something personal, something unique, when there are so many good and sometimes even brilliant renditions in great numbers. Beware of general themes. Cling to those that your every- day life offers you. Write about your sorrows, your wishes, your passing thoughts, your belief in anything beautiful. Describe all that with fervent, quiet, and humble sincerity. In order to express yourself, use things in your surroundings, the scenes of your dreams, and the subjects of your memory.
If your everyday life appears to be unworthy subject matter, do not complain to life. Complain to yourself. Lament that you are not poet enough to call up its wealth. For the creative artist there is no poverty—nothing is insignificant or unimportant. Even if you were in a prison whose walls would shut out from your senses the sounds of the outer world, would you not then still have your childhood, this precious wealth, this treasure house of memories? Direct your attention to that. Attempt to resurrect these sunken sensations of a distant past. You will gain assuredness. Your aloneness will expand and will become your home, greeting you like the quiet dawn. Outer tumult will pass it by from afar.
~ Rainer Maria Rilke
from Letters to a Young Poet (the first letter)
translated by Joan M. Burnham