Wisdom of today : Sri Aurobindo, Hymns to the Mystic Fire.

The preoccupation of the Mystics was with self-knowledge and a profounder world-knowledge; they found out that in man there was a deeper self and inner being behind the surface of the outward physical man, which it was his highest business to discover and know. “Know thyself” was their great precept, just as in India to know the Self, the Atman became the great spiritual need, the highest thing for the human being. They found also a Truth, a Reality behind the outward aspects of the universe and to discover, follow, realise this Truth was their great aspiration. They discovered secrets and powers of Nature which were not those of the physical world but which could bring occult mastery over the physical world and physical things and to systematise this occult knowledge and power was also one of their strong preoccupations. But all this could only be safely done by a difficult and careful training, discipline, purification of the nature; it could not be done by the ordinary man. If men entered into these things without a severe test and training it would be dangerous to themselves and others; this knowledge, these powers could be misused, misinterpreted, turned from truth to falsehood, from good to evil. A strict secrecy was therefore maintained, the knowledge handed down behind a veil from master to disciple. - Sri Aurobindo