XX. . . . . . . To all the professed knights, both in winter and summer, we give, if they can be procured, white garments, that those who have cast behind them a dark life may know that they are to commend themselves to their Creator by a pure and white life. For what is whiteness but perfect chastity, and chastity is the security of the soul and the health of the body. And unless every knight shall continue chaste, he shall not come to perpetual rest, nor see God, as the apostle Paul witnesseth: Follow after peace with all men, and chastity, without which no man shall see God. . . . . . .