釋禪波羅蜜次第法門 10.96

10.96

第一、釋名。覺觀等三法，名同次位，已如前根本禪中說，三昧今當分別。一切禪定攝心，皆名為三摩提，秦言正心行處。是心從無始已來，常曲不端，得是正心行處，心則端直，故名三昧。譬如蛇行常曲，入筒則直。此亦如是。

First, explaining the name: The names and sequential stages of the three factors of vitarka, vicāra, and so forth have already been explained above in the fundamental dhyānas; samādhi will now be distinguished. All concentration of mind in dhyāna is called samādhi, translated into the language of Qin as 'the sphere of correct mental activity'. Since beginningless time, this mind has always been crooked and not upright; upon attaining this sphere of correct mental activity, the mind becomes upright and straight, and is therefore called samādhi. For example, a snake always moves crookedly, but becomes straight upon entering a tube. This is also like that.