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

“So, even as you helped me, blindly, against your will,
So shall the angel faces watch for your own souls still.
A little pain and pleasure, a little touch of time,
And you shall blindly reach to the subtle and sublime;
You shall gather up your girdles to make ready for the way,
And by the Cross of Suffering climb seeing to the Day.
Then we shall meet again in the Presence of the Throne,
Not knowing; yet in Him! O Thou! knowing as we are known.” [via]