Unless you become like the things that actually exist, it is impossible for you to see them. Yet this is not how it is in our world. We see the sun without being a sun. We see the heaven and the earth and everything else, but we are not them...But when we see things in the spiritual realm, we become those things. We see the Spirit, we become spirit...In our world, you see everything except yourself, but in the spiritual realm, you see yourself. And what you see, you will become.
Gospel of Philip (translation is mine; with occasional adjustment of person and tense for aesthetics)