KN.DHP157-166 — The Chapter on the Self
If one regards oneself as dear, one should guard oneself well. A wise person should care for oneself during one of the three watches of the night.
The Story of the Elder Upananda, Son of the Sakyans
First, one should establish oneself in what is proper. Then, one may instruct others. A wise person should not become defiled.
The Story of the Elder Tissa, the Striver and The Story of the Elder Nun, Mother of Kumārakassapa
If one acts as one instructs others, then one is well-tamed. Indeed, the self is difficult to tame. The self is indeed one's own protector. Who else could be the protector? With a well-tamed self, one finds a protector hard to find.
The Story of the Lay Follower Mahākāla and The Story of Devadatta
The evil done by oneself, born of oneself, arising from oneself, crushes the foolish one, as a diamond crushes a rock. For one whose conduct is exceedingly corrupt, like a creeper covering a tree, such a person brings about their own downfall, as an enemy wishes.
The Story of the Attempt to Split the Saṅgha and The Story of the Elder Kāla
Evil deeds, harmful to oneself, are easy to do. But what is beneficial and good is indeed very difficult to do. The foolish one who rejects the teaching of the worthy ones, the noble ones who live by the Dhamma, relying on a wrong view, bears fruit like the bamboo, for self-destruction.
The Story of the Lay Follower Cūḷakāla and The Story of the Elder Attadattha
By oneself is evil done, by oneself is one defiled. By oneself is evil not done, by oneself is one purified. Purity and impurity depend on oneself; no one can purify another. One should not neglect one's own welfare for the sake of another's, however great. Knowing one's own welfare, one should be intent on one's true goal.