自古欲修金丹大道,门径虽多,但想把握精微却极不易,故后学者有志者无不参照前贤有大成就者所著经典来作为理论指导与修持指南。然而,这些古籍无不使用隐语,故一直流传着:“修道者(修金丹大道的人)多如牛毛,成就者(练成内丹的)如凤毛麟角。” Since ancient times to repair saver Avenue, although the number of doors, but want to grasp the subtle but extremely difficult, so after all those who are interested in the scholars refer to the predecessors have a great accomplishments of the classic as a theoretical guidance and practice guide. However, these ancient books all use metaphors, so it has been circulating: “The ascetics (people of Jindian Avenue) are numerous, and the achievements of the accomplished (inner alchemy) scholars are rare.”