首楞嚴義疏注經 1.169

1.169

因苗辨地，言直心直；苟或反此，罪非輕小。如下經云「若大妄語，即三摩提不得清淨，成愛見魔，失如來種。若諸比丘心如直絃，一切真實入三摩地，永無魔事，我印是人成就菩薩無上知覺也。」發心曰始，究竟名終。彈指能超，故無委曲。

Discerning the soil from the sprout, speech is straightforward when the mind is straightforward; if it were contrary to this, the fault would be no small matter. As a later passage of the sūtra states: 'If one commits great falsehood, one's samādhi will not be pure; one will become a demon of affection and views, and lose the seed of the Tathāgata. If monks have minds like a straight lute-string, being real and true in everything, and enter samādhi, they will forever be free from demonic affairs; I seal such people as accomplishing the unexcelled enlightenment of a bodhisattva.' Bringing forth the aspiration is called the 'beginning'; ultimate realization is called the 'end.' Being able to transcend in the snap of a finger, there are no devious aspects.