So much depends on the not-I, on how you name it, on how you treat that name. What could the evidence be? Since it doesn't speak, it can only come from you. You are the witness of it, you express it in poetry, in your way of dwelling. Out of that you grow your systems, and also your receptivity to how it appears from elsewhere. There is a conviction you have about these things, and it is one that has either been breathed-in, or force-fed, from the miasmas feeding the mind or gained in some turn-around of the soul impossible to doubt. And what are those miasmas but the accumulated shells of others' revelations ground up and digested by the medium? What could be more attractive to the half-awakened soul that the effects of others' convictions? These are the most excellent of mimetic attractors. Choose your poetry off the shelf until you discover how unexpectedly far your freedom extends.