Open and free for All: The Ratnaketu Sutra: or how Mara took Refuge

The Ratnaketu Sutra (Ratnaketuparivarta) is a significant Mahayana text that focuses on several key doctrinal and practical aspects of Buddhism.

The sutra is particularly important for its teachings on:

1. The bodhisattva path and the development of bodhicitta (the aspiration to achieve enlightenment for the benefit of all beings)

2. Dharani practices - it contains important dharani (mantra-like recitations) that were influential in the development of esoteric Buddhist practices

3. Pure Land teachings - it includes descriptions of various buddha-fields and their qualities, contributing to the development of Pure Land Buddhist thought

The text was translated into Chinese and Tibetan, indicating its widespread influence across different Buddhist traditions. In Chinese, it's known as Bǎoxīng Jīng (寶星經).