YS I 19 bhava-pratyayo videha-prakRtilayaanaam
Taimni's translation: Of those who are /videhas/ and /prakRtilayas/ birth is the cause [of (asaMprajñaata??) samaadhi -- card]. YS I 20 shraddhaa-viirya-smRti-samaadhi-prajñaa-puurvaka itareSaam. (In the case) of others (/upaaya-pratyaya-yogis/) it is preceded by faith, energy, memory and high intelligence necessary for /samaadhi/. Taimni's comment on /smRti/ on page 50: http://www.scribd.com/doc/8998719/The-Science-of-YOGA That seems to make sense, IMO.
