摩訶止觀 4.8

4.8

First, possessing the five conditions: 1. purity in keeping the precepts; 2. sufficiency of clothing and food; 3. dwelling in a tranquil and quiet place; 4. putting an end to all distracting involvements and duties; 5. finding a good spiritual friend (kalyāṇamitra). The Meditation Sūtra says: 'Although the four conditions may be fully possessed, guidance depends upon a good master.' Thus one uses these five methods as a ladder for entering the way; if one is missing, it obstructs the undertaking. An explanation of this is given in full in the Cidi chanmen.