“Vain, very vain, my weary search to find
That bliss which only centers in the mind.”

“Socrates,” p. 67
The Sun Watches the Sun (1999), Sequence: “A Stone and a Word”

Source: Sayings of Sri Ramakrishna (1960), p. 164
Context: Two friends went into an orchard. One of them possessing much worldly wisdom, immediately began to count the mango trees there and the number of mangoes each tree bore, and to estimate what might be the approximate value of the whole orchard. His companion went to the owner, made friends with him, and then, quietly going into a tree, began at his host's desire to pluck the fruits and eat them. Whom do you consider to be the wiser of the two? Eat mangoes. It will satisfy your hunger. What is the good of counting the trees and leaves and making calculations? The vain man of intellect busies himself with finding out the "why" and "wherefore" of creation, while the humble man of wisdom makes friends with the Creator and enjoys His gift of supreme bliss.

"Address to Happiness", from Poems, on Various Occasions (1806)

Source: One Hundred Years of Solitude

As quoted in Making a Habit of Success: How to Make a Habit of Succeeding, How to Win With High Self-Esteem (1999) by MacK R. Douglas, p. 45. Unsourced variant: What this power is, I cannot say. All I know is that it exists... and it becomes available only when you are in that state of mind in which you know exactly what you want...and are fully determined not to quit until you get it.
Context: I had made up my mind to find that for which I was searching even if it required the remainder of my life. After innumerable failures I finally uncovered the principle for which I was searching, and I was astounded at its simplicity. I was still more astounded to discover the principle I had revealed not only beneficial in the construction of a mechanical hearing aid but it served as well as means of sending the sound of the voice over a wire. Another discovery which came out of my investigation was the fact that when a man gives his order to produce a definite result and stands by that order it seems to have the effect of giving him what might be termed a second sight which enables him to see right through ordinary problems. What this power is I cannot say; all I know is that it exists and it becomes available only when a man is in that state of mind in which he knows exactly what he wants and is fully determined not to quit until he finds it.

Ed ogni altro martir passa ed avanza
Trovarsi vana l'ultima speranza.
XXIX, 13
Rifacimento of Orlando Innamorato

Cold Mountain: 100 Poems by the T'ang Poet Han-shan

Source: Pretties

To the Reformers of England, reported in Bartlett's Familiar Quotations, 10th ed. (1919)