摩訶止觀 4.48

4.48

次見羅剎乞浮囊者，若為財色而毀戒者，如前所說，觸人皆爾，此名「已起之惡」；為除斷故，一心勤精進。若見心猛利，於所計法而起罪過，此是解僻，名「未生之惡」；為不生故，一心勤精進。此見雖未起，若修得少禪，無好師友，即生念著而起過患。佛在世，一比丘得四禪，謂為四果。臨終見中陰起，即謗佛云：「羅漢不生，今那得生？」阿難問佛：「此人命過，今生何處？」佛言：「已墮地獄。」雖持戒得有漏禪，是亦不可信。佛在世尚爾，況末代癡人，罪著深重！

Next, the view-rākṣasa begging for the float: if one violates the precepts for wealth and sex, as explained before, everyone encountered is like this; this is called "evil that has already arisen"; in order to eliminate and sever it, one single-mindedly and diligently makes vigorous progress. If the mind of views is fierce and sharp, giving rise to sins and faults regarding the phenomena grasped, this is perverted understanding, called "evil that has not yet arisen"; in order to keep it from arising, one single-mindedly and diligently makes vigorous progress. Although this view has not yet arisen, if through cultivation one attains a little dhyāna and lacks good teachers and friends, one then gives rise to attached thoughts and brings about faults. When the Buddha was in the world, a monk attained the fourth dhyāna and thought it was the four fruits [of arhatship]. Approaching death, seeing the intermediate existence arise, he then slandered the Buddha, saying: "An arhat is not reborn; how am I now being reborn?" Ānanda asked the Buddha: "This person has passed away; where is he now reborn?" The Buddha said: "He has already fallen into hell." Although upholding the precepts and attaining defiled dhyāna, this too cannot be trusted. Even when the Buddha was in the world it was like this, how much more so for foolish people in the final age, whose sin and attachments are deep and heavy!