Discretion

From the additional notes to Charkes Spurgeon's The Treasury of David, Psalm 112:

Verse 5. Discretion. There is a story, concerning divers ancient Fathers, that they came to St. Anthony, enquiring of him, what virtue did by a direct line lead to perfection, that so a man might shun the snares of Satan. He bade every one of them speak his opinion; one said, watching and sobriety; another said, fasting and discipline; a third said, humble prayer; a fourth said, poverty and obedience; and another, piety and works of mercy; but when every one had spoken his mind, his answer was, That all these were excellent graces indeed, but discretion was the chief of them all. And so beyond doubt it is; being the very Auriga virtutum, the guide of all virtuous and religious actions, the moderator and orderer of all the affections; for whatsoever is done with it is virtue, and what without it is vice. An ounce of discretion is said to be worth a pound of learning. As zeal without knowledge is blind, so knowledge without discretion is lame, like a sword in a madman's hand, able to do much, apt to do nothing. Tolle hanc et virtus vitium erit. He that will fast must fast with discretion, he must so mortify that he does not kill his flesh; he that gives alms to the poor, must do it with discretion, Omnipetenti non omnia petenti—to every one that doth ask, but not everything that he doth ask; so likewise pray with discretion, observing place and time; place, lest he be reputed a hypocrite; time, lest he be accounted a heretic. Thus it is that discretion is to be made the guide of all religious performances.—Quoted by John Spencer, 1658