Quando não se tem nada para dizer

What I am maintaining is, that the first effort of the poet should be to achieve clarity for himself, to assure himself that the poem is the right outcome of the process that has taken place. The most bungling form of obscurity is that of the poet who has not been able to express himself to himself; the shoddiest form is found when the poet is trying to persuade himself that he has something to say when he hasn't.

T. S. Eliot. The Three Voices of Poetry. CUP (1954)