“Love rules, but no one knows where it has its throne; in order to know that secret place, you must first submit to Love.”

Source: The Sisterhood of the Traveling Pants

Canto I
The Troubadour (1825)

Source: Falling Upward: A Spirituality for the Two Halves of Life

Vol. XI, p. 288
Posthumous publications, The Collected Works
Context: We know only fragmentarily this extraordinary thing called life; we have never looked at sorrow, except through the screen of escapes; we have never seen the beauty, the immensity of death, and we know it only through fear and sadness. There can be understanding of life, and of the significance and beauty of death, only when the mind on the instant perceives “what is”. You know, sirs, although we differentiate them, love, death, and sorrow are all the same; because, surely, love, death, and sorrow are the unknowable. The moment you know love, you have ceased to love. Love is beyond time; it has no beginning and no end, whereas knowledge has; and when you say, “I know what love is”, you don’t. You know only a sensation, a stimulus. You know the reaction to love, but that reaction is not love. In the same way, you don’t know what death is. You know only the reactions to death, and you will discover the full depth and significance of death only when the reactions have ceased.

Diogenes Laërtius (trans. C. D. Yonge) The Lives and Opinions of Eminent Philosophers (1853), "Solon", sect. 12, p. 29.

Original: (it) Il vero amore consiste nel mettere sempre al primo posto la persona che in ogni dove senti far parte di te.
Source: prevale.net

"Birches" (1920)
General sources
Source: Swinger of Birches
Context: I’d like to get away from earth awhile
And then come back to it and begin over.
May no fate willfully misunderstand me
And half grant what I wish and snatch me away
Not to return. Earth’s the right place for love:
I don’t know where it’s likely to go better.