Babylon 5, Season 5: The Wheel of Fire

Lyta Alexander:
Byron, the Vorlons changed me. More than you could possibly know. I don't know what it'll do once you get past my barriers and I get past yours. It could burn you.

Byron:
Then let it burn.

[After they make love, Lyta's barriers go down, and they both witness the full measure of what the Vorlons did:
not only to her, but to all telepaths. They meet with the rest of Byron's people.]

Byron:
It was the Vorlons.

Lyta:
Yes.

Byron:
They created telepaths on a hundred worlds. Interfered with their genetic development. Took people from their homeworlds and adjusted them over the course of the centuries.

Lyta:
Yes.

Byron:
Because they needed telepaths in their war against the Shadows. Needed us as cannon fodder.

Lyta:
Yes.

Byron:
We would be normal. We would have lives. We would be able to walk and live and work among normals without fear of persecution if the Vorlons had not interfered with our normal development. We were made for their benefit, to save them. We were told that our abilities were our gift and our curse, and that we were somehow responsible for it. But we're not. We're not.