“He, that noble prize possessing—
He that boasts a friend that's true,
He whom woman's love is blessing,
Let him join the chorus too!”

Source: Home Truths (1859), Ch. II: "Do You Want a Friend?", p. 21

Source: Westmark

Source: Why Men Love Bitches: From Doormat to Dreamgirl-A Woman's Guide to Holding Her Own in a Relationship

Thoughts and Aphorisms (1913), Bhakti

Riyadh-as-Saliheen by Imam Al-Nawawi, volume 3, hadith number 367
Sunni Hadith

Alcun non può saper da chi sia amato,
Quando felice in su la ruota siede:
Però c'ha i veri e i finti amici a lato,
Che mostran tutti una medesma fede.
Se poi si cangia in tristo il lieto stato,
Volta la turba adulatrice il piede;
E quel che di cor ama riman forte,
Ed ama il suo signor dopo la morte.
Canto XIX, stanza 1 (tr. B. Reynolds)
Orlando Furioso (1532)

As quoted in O₂ : Breathing New Life Into Faith (2008) by Richard Dahlstrom, p. 223; this source is disputed as it does not cite an original document for the quote.
Disputed
Context: Isn't it bewildering … that everything is so beautiful, despite all the horrors that exist? Lately I've noticed something grand and mysterious peering into my sheer joy in all that is lovely — the sense of a Creator whom innocent creation worships with its beauty. Only man can be hateful or ugly, because he possesses a free will to cut himself off from the chorus of praise. It often seems that he will succeed in drowning out this chorus with his cannon thunder, curses, and blasphemy. But it has become clear to me this spring that he cannot. And so I must try to throw myself on the side of the victor.

Die Braut von Messina (The Bride of Messina), Act IV, sc. iv (1803)