Brahmacarya essentially means the vow not to marry but to observe strict celibacy ( bṛhad-vrata ). A brahmacārī or sannyāsī should avoid talking with women or reading literature concerning talks between man and woman. The injunction restricting association with women is the basic principle of spiritual life. Associating or talking with women is never advised in any of the Vedic literatures. The entire Vedic system teaches one to avoid sex life so that one may gradually progress from brahmacarya to gṛhastha, from gṛhastha to vānaprastha, and from vānaprastha to sannyāsa and thus give up material enjoyment, which is the original cause of bondage to this material world. The word bṛhad-vrata refers to one who has decided not to marry, or in other words, not to indulge in sex life throughout his entire life.