Mahāyāna sūtras contain several elements besides the promotion of the bodhisattva ideal, including "expanded cosmologies and mythical histories, ideas of purelands and great, ‘celestial’ Buddhas and bodhisattvas, descriptions of powerful new religious practices, new ideas on the nature of the Buddha, and a range of new philosophical perspectives." These texts present stories of revelation in which the Buddha teaches Mahāyāna sutras to certain bodhisattvas who vow to teach and spread these sutras. These texts also promoted new religious practices that were supposed to make Buddhahood easy to achieve, such as "hearing the names of certain Buddhas or bodhisattvas, maintaining Buddhist precepts, and listening to, memorizing, and copying sutras." Some Mahāyāna sūtras claim that these practices lead to rebirth in Pure lands such as Abhirati and Sukhavati, where becoming a Buddha is much easier to achieve.