“Strategy is the craft of the warrior.”

Go Rin No Sho (1645), The Book No-Thing-ness
Context: To attain the Way of strategy as a warrior you must study fully other martial arts and not deviate even a little from the Way of the warrior. With your spirit settled, accumulate practice day by day, and hour by hour. Polish the twofold spirit heart and mind, and sharpen the twofold gaze perception and sight. When your spirit is not in the least clouded, when the clouds of bewilderment clear away, there is the true void.

Go Rin No Sho (1645), The Water Book

Letter to Lambertus Grunnius (August 1516), publised in Life and Letters of Erasmus : Lectures delivered at Oxford 1893-4 (1894) http://books.google.com/books?id=ussXAAAAMAAJ&pg=PA180&lpg=PA180&dq=%22is+no+discipline+and+which+are+worse+than+brothels%22&source=bl&ots=PnJjrkSLNB&sig=JPY0PhTf2YgYwJlf3uH2eTvCJeA&hl=en&ei=BGwXTNqTA5XANu6_pJ8L&sa=X&oi=book_result&ct=result&resnum=1&ved=0CBIQ6AEwAA#v=onepage&q=%22is%20no%20discipline%20and%20which%20are%20worse%20than%20brothels%22&f=false edited by James Anthony Froude, p. 180
Context: There are monasteries where there is no discipline, and which are worse than brothels — ut prae his lupanaria sint et magis sobria et magis pudica. There are others where religion is nothing but ritual; and these are worse than the first, for the Spirit of God is not in them, and they are inflated with self-righteousness. There are those, again, where the brethren are so sick of the imposture that they keep it up only to deceive the vulgar. The houses are rare indeed where the rule is seriously observed, and even in these few, if you look to the bottom, you will find small sincerity. But there is craft, and plenty of it — craft enough to impose on mature men, not to say innocent boys; and this is called profession. Suppose a house where all is as it ought to be, you have no security that it will continue so. A good superior may be followed by a fool or a tyrant, or an infected brother may introduce a moral plague. True, in extreme cases a monk may change his house, or even may change his order, but leave is rarely given. There is always a suspicion of something wrong, and on the least complaint such a person is sent back.

Radio interview on Radio Alice (KLLC 97.3)

Source: Drenai series, Legend, Pt 1: Against the Horde, Ch. 28

Source: Conversation, Cognition and Learning (1975), p. 261 as cited in: K.V. Wilson (2011) From Associations to Structure. p. 200.

The Manual of the Warrior of Light (1997)
Context: Every Warrior of the Light has suffered for the most trivial of reasons. Every Warrior of the Light has, at least once, believed he was not a Warrior of the Light.
Every Warrior of the Light has failed in his spiritual duties.
Every Warrior of the Light has said "yes" when he wanted to say "no."
Every Warrior of the Light has hurt someone he loved.
That is why he is a Warrior of the Light, because he has been through all this and yet has never lost hope of being better than he is.
Each stone, each bend cries welcome to him. He identifies with the mountains and the streams, he sees something of his own soul in the plants and the animals and the birds of the field.
Then, accepting the help of God and of God's signs, he allows his personal legend to guide him toward the tasks that life has reserved for him.
On some nights, he has nowhere to sleep, on others he suffers from insomnia. "That's just how it is," thinks the warrior. "I was the one who chose to walk this path."
In these words lies all his power: He chose the path along which he is walking and so has no complaints.

Lo schermitor vinto è di schermo.
Canto XIX, stanza 14 (tr. Fairfax)
Gerusalemme Liberata (1581)