Maarif is the only book left from Baha Walad, Mohammad Ibn Hussein Khatibi Balkhi, Molana’s father. Baha Walad and his work, Maari, have been overlooked in the course of history by literati as well as people fond of mysticism and literature. But nowadays his true, plain, pure, and rhetoric-free mysticism has attracted many Iranians, scholars, and Westerners fond of mysticism. Contrary to what is conceived of its title, the book is not an ordered collection of opinions and beliefs; in fact, it contains a diverse and miscellaneous collection of thoughts, dreams, imaginations, reflection on the meaning and exegesis of Koran verses as well as their mystic gloss, thinking about topics of Islamic Logic like determinism and free will, and occasionally an anthology of his sermons and orations. Regardless of any topic arrangement, all these have been brought together by him or the others and later have been entitled Maarif-e-Baha Walad. His mysticism is a positive and social (companionship) one and is based on the feelings of rapture, joy, and zest (contrary to the mysticism based on asceticism and fear), for it emphasizes divine fondness, beauty, and kind attentiveness. Veil (Hejab) is one of the mystical categories presented in this book. In this paper, first, we define mystical Veil considering what early Sufis have said; then we investigate Baha Walad’s thoughts in detail with regard to this mystical position, and then we will show the reflection of Baha Walad’s thoughts in the Mathnawi of Molawi.