Patanjali Yoga Sutra – Kaivalya Pada
What is perception ?
4.15. Vastusamye chittabhedattayovibhaktah panthah|
- Vastusamye-by sameness of the object
- Chittabhedat-by the difference of the mind
- Tayoh-of these two
- vibhaktah –separate
- panthah-path of manifestation
Because of the sameness of object and difference of mind their ways are different.