Verse 18
विरामप्रत्ययाभ्यासपूर्वः संस्कारशेषोऽन्यः ॥१८॥
virāma-pratyaya-abhyāsa-pūrvaḥ saṁskāra-śeṣo-‘nyaḥ ॥18॥
virama = cessation
pratyaya = perception, thought, intention, representation
abhyasa = practice, action, method
purvah = earlier
samskara = latent impressions
sheshah = store, residuum
anyaha = other
After one practices to still the thoughts, these four kinds of cognition fall away(mentioned in previous sutra 1.17), leaving only a store of latent impressions (samskara) in the depth memory.
The other state of insight, which is based on persistent practice, arises when all perception has been extinguished and only non-manifest impressions remain. ||18||
PATANJALI YOGA SUTRAS