Saṃyutta Nikāya 45
Connected Discourses on the Path
27. The Pot
At Savatthī. “Bhikkhus, just as a pot without a stand is easily knocked over, while one with a stand is difficult to knock over, so the mind without a stand is easily knocked over, while the mind with a stand is difficult to knock over.
“And what, bhikkhus, is the stand of the mind? It is this Noble Eightfold Path; that is, right view ... right concentration. This is the stand of the mind.
“Bhikkhus, just as a pot ... so the mind without a stand is easily knocked over, while the mind with a stand is difficult to knock over.”