Human failings may be imputed to Brahmans, but it must be recognized that the ideals of their caste were of a high order. They were supposed to be born with “spiritual lustre”, and their lives were consecrated to the instruction and uplifting of mankind and the attainment of salvation. A Brahman's life was divided into four periods. The first was the period of childhood, and the second was the period of probation, when he went to live in a forest hermitage, where he acted as the servant of a revered old sage, his spiritual father, and received instruction in Brahmanic knowledge for a number of years. During the third period the Brahman lived the worldly life; he married and reared a family and performed the duties pertaining to his caste. Hospitality was one of the chief worldly duties; if a stranger, even although he might be an enemy, came and asked for food he received it, although the Brahman family should have to fast to supply him. In the fourth period the Brahman, having proved himself a faithful husband and exemplary father, divided his worldly possessions between his grown-up sons and daughters; then he abandoned his comfortable home and, assuming the deerskin clothing of hermits, went to live in a lonely forest, or among the Himalayan mountains, to prepare for the coming of death, far away from the shadows cast by sin and sorrow. In solitude he performed rigid penances and addressed himself with single-minded devotion to the contemplation of spiritual problems. Subduing the five senses, he attained to the state of Yoga (concentration). Placing his mind entirely upon the contemplation of the soul, he became united ultimately with the World Soul (God), thus obtaining the release which was Salvation. Some Brahmans were teachers who instructed pupils and composed the sacred writings. The forest hermitages were the universities of ancient India.