Mistaking the Seer
There is a simplicity to the Yoga Sutras. While it may appear complicated when reading the Yoga Sutras and commentaries, the central theme is removing, transcending or setting aside the obstacles, veils or false identities of the Self. The suggestions in the Yoga Sutras are refinements of how to do this. Being mindful of this core simplicity is how to progress on the path of Yoga.
Once obstacles and false identities have been set aside, the true Self, which is here, naturally comes shining through (PYSI.3). The rest of the time, we are entangled with false identities so we do not see that this misidentification has happened (PYSI.4). It is said that we are asleep, and need to awaken. That awakening to the Self is Yoga.