For any practice, from the moment you begin it until you reach its ultimate end – whether thunder falls from above, a lake springs from below, or rocks fall from all sides – having sworn not to break your promise even at the cost of your life, you should persevere until the end. From the very beginning, you should come progressively to an established schedule of periods for practice, sleep, meals, and breaks, allowing no bad habits. Whether your practice is elaborate or simple, you should make it even and regular, never sporadic, and not even for an instant should you leave any room for the ordinary.

~ Dudjom Rinpoche
Extracting the Quintessence of Accomplishment
Oral Instructions for the Practice of Mountain
Retreat Expounded Simply and Directly
in Their Essential Nakedness

Photo of HH Dudjom Rinpoche
representation  at Pema Osel Ling