Yoga Sutra I-46 -TA EVA SABIJAH SAMADHIH - All these samadhis are sabija (with seed), which could bring one back into bondage or mental disturbance.
The seeds being spoken about here are desires and attachments. Swami Satchidananda states that in all the samadhis previously mentioned, the goal has not been reached. "Even after acquiring all these states," (of samadhi) "you can come back as an ordinary person because of the impressions are still there." In other words, you can experience these states, but if the desires are not completely burned up because the mind is not completely purified, you can once again become plagued with the vrittis of the mind . Therefore, Swami Satchidananda says that is why one should make the mind purified before one practices deep meditation. He goes on to illustrate that even an "impure" mind can see GOD but from a wrong angle.
In his commentary scientists are illustrated as "Yogis" in the sense of how deep they concentrate and meditate producing discoveries and inventions. They are able to get to plumb the secrets of the atoms. He ends his comments stating if we are" to go into the secrets of life and the universe and gain control over them, we should have pure minds to make the proper use of them." If not we will bring destruction on the whole of humanity. Purification of the mind is very necessary.
