Good and bad zeal

Just as there is an evil zeal of bitterness which separates from God and leads to hell, so is there a good zeal which separates from evil and leads to God and life everlasting.

Let monks, therefore, exercise this zeal with the most fervent love. Let them, that is, give one another precedence. Let them bear with the greatest patience one another’s infirmities, whether of body or of character. . . . Let them practice fraternal charity with a pure love. Let them fear God. . . . Let them prefer nothing whatever to Christ. And may he bring us all to life everlasting.