What comes from the long term practice of yoga -2 ?
Finding the atma from the Mandukya Upanishad
नायमात्मा बलहीनेन लभ्य: (3.2.4)
The Mandukya upanishad is the shortest upanishad and is quoted in Ramayana as the one Upanishad that is alone sufficient for getting Moksha (Liberation). It goes into detail about the atma (indweller or Purusha) and how it is revealed.
Manduka means frog. Just as a frog has 4 stages in its life (egg, tadpole, froglet and frog), humans have 4 stages of consciousness - awake, sleep, dreams and turiya or pure consciousness experienced during deep samadhi. It is said that when one does the right practice (i.e. the limbs of yoga, especially meditation), for a long time without hankering for results then the Atma will reveal itself to the practitioner.
The verses below are from section 3.2 of the Mandukya Upanishad.
This atma cannot be attained by the study of the vedas nor can it be attained by the intellect nor much by listening to the sacred scriptures. This atman is attainable by they to whom it chooses to reveal its form.
This atma is never attained by the weak nor by the inattentive, nor even by one performing improper austerities. The wise who strive by these means (of yoga) his atma enters the world of the brahman.