Katagiri-roshi taught that it's not important whether a spiritual teacher has reached his peak or not. It only matters whether he has digested the truth he has experienced. Thorough digestion takes time and care, consciousness and commitment. Lastly, it takes a fine-tuned instinct for the middle way — the right regimen, day after day, so you can continue with it endlessly.
— Gail Sher, One Continuous Mistake