1. Samadhi is not like a stone-like inert state as many foolish persons imagine. When the self is bound down to its empirical accidents, its activities are not fully exercised, and when the limitations of the empirical existence are transcended the universal life is identified and you have enrichment of the self. You will have a rich inner life. You will have an expanded cosmic life and supra-cosmic life too.
2. Intuition is a spiritual Anubhava. It is direct perception or immediate knowledge through Samadhi. Professor Bergsen of France preaches about intuition to make the people understand that there is another higher source of knowledge than intellect. In intuition there is no reasoning process at all. It is Pratyaksha. Intuition transcends reason but does not contradict it. Intellect takes a man to the door of intuition and returns back. Intuition is Divya Drishti. It is Jnana-Chakshu. Spiritual flashes and glimpses of Truth come through intuition. Inspiration, revelation, spiritual insight come through intuition.
3. A sudden stroke of mystic illumination puts an end to all the empirical existence altogether and the very idea or remembrance of such a thing as this world absolutely leaves the self.
4. Samadhi is of two kinds viz., Jada Samadhi and Chaitanya Samadhi. A Hatha Yogi, through the practice of Khechari Mudra, can shut himself in a box which is buried underneath the ground for months and years. There is no supersensual knowledge in this kind of Samadhi. In Chaitanya Samadhi, there is perfect awareness. The Yogi comes down with new, supersensuous wisdom.
5. A Hatha Yogi draws all his Prana from the different parts of his body and takes it to the Sahasrara Chakra at the top of the head. Then he enters into Samadhi. Therefore it is very difficult to bring him down to objective consciousness by merely shaking his body. Hatha Yogis have remained buried underneath the earth in Samadhi for thousands of years. They plug the posterior nostrils through Khechari Mudra with their tongue. You can bring down to normal objective consciousness a Raja Yogi or a Bhakta or a Jnana Yogi by mere shaking of the body or blowing a conch. Queen Chudalai brought down her husband Sikhidhvaja from Samadhi by shaking his body. Lord Hari brought Prahlada down from his Samadhi by blowing His conch.
6. A Bhakta gets Bhava Samadhi through Prema of the Lord. A Raja Yogi gets Asamprajnata Samadhi through Chitta Vritti Nirodha, by suppressing the mental modifications. A Vedantin gets Samadhi through Mithyatva Buddhi and concentration on the idea of Asti-Bhati-Priya (the Anvaya method).
7. When the Yogi has reached the last perfect stage of meditation and Samadhi, the fire whereof burns all the residue of his actions. He at once gets liberation in this very life (Jivanmukti).
8. During sleep you rest in Sat-chit-ananda Atman or pure consciousness and enjoy the spiritual bliss which is independent of objects. The difference between sleep and Samadhi is that, in sleep there is the veil of ignorance. When you come down from Samadhi you come with new spiritual knowledge.
9. If there is a mind, there is the world also. If you can produce Mano-nasa consciously through Sadhana by getting rid of this little 'I' and 'mineness', this world will disappear.
10. The Yogi ascends the various rungs of the Yogic ladder, stage by stage and acquires different experiences, knowledge and powers. He first gets Savitarka and Nirvitarka Samadhi. He then enters Savichara and Nirvichara Samadhi. Then he experiences Sananda and Sasmita Samadhi.