An important part of this revival movement was the widespread promotion of Buddhist doctrinal learning (especially of the Abhidhamma) coupled with the practice of meditation (among the monastic and lay communities). Ledi Sayadaw (1846–1923) became an influential figure of this "vipassana movement", which was seen as a way to safeguard and preserve Buddhism. He traveled widely teaching and preaching, and also founded numerous lay study and meditation groups. He also wrote voluminously. His output included meditation manuals and the "Paramattha Sankhip," which was a Burmese verse translation of the "Abhidhammatthasaṅgaha." According to Ledi, the study of this text and the practice of meditation allowed even laypersons to attain awakening "in this very life." His teachings were extremely influential for the later post-colonial spread of meditation by figures such as U Ba Khin, S. N. Goenka, and Mahasi Sayadaw.