See but One, say but One, know but One.

Gulshān i Rāz, 1. 883.

The Alif of the Loved One's form is graven on my heart,
No other letter did my Shaikh ever to me impart.

ḤĀFI, Ode 416 (ed. Brockhaus).

My heart inquired, “What is the heaven-sent lore?
If thou'st attained it, teach me, I implore.”
Alif,” I said, “if there be one within,
One letter serves to name him—say no more.”

OMAR KHAYYĀM, Quatrain 109.