Learn not to let these three things weaken. Faith and respect for your guru must not weaken since all the fine qualities of mahayana dharma depend on him. Enthusiasm for meditation on mind training must not weaken since mind training is the very core of the mahayana. Observation of the precepts of the three ordinations must not weaken either.

From THE GREAT PATH OF AWAKENING, by Jamgn Kongtrul, translated by Ken McLeod. 1993 by Ken McLeod.
Published by arrangement with Shambhala Publications, Inc., Boston.