Synthesis in The Gate of the Sanctuary from The Temple of the Holy Ghost (Collected Works, Vol I) by Aleister Crowley.

“I love you now again with an undivided song.
Because I can never love you, I cannot do you wrong.
I saw in your dying embraces the birth of a new embrace;
In the tears of your pitiful faces, another Holier Face.
Unknowing it, undesiring, your lips have led me higher;
You have taught me purer songs that your souls did not desire;
You have led me through your chambers, where the secret bolt was drawn,
To the chambers of the Highest and the secrets of the Dawn!
You have brought me to command you, and not to be denied;
You have taught me in perfection to be unsatisfied;
You have taught me midnight vigils, when you smiled in amorous sleep;
You have even taught a man the woman’s way to weep.” [via]