It is indeed certain, that whoever attempts any common topick, will find unexpected coincidences of his thoughts with those of other writers; nor can the nicest judgment always distinguish accidental similitude from artful imitation. – Samuel Johnson, 1751

Find out the reason that commands you to write; see whether it has spread its roots into the very depth of your heart; confess to yourself you would have to die if you were forbidden to write. – Rainer Maria Rilke