Dhp 39-40 · Thought
If a man's thoughts are not dissipated, if his mind is not perplexed, if he has ceased to think of good or evil, then there is no fear for him while he is watchful. Knowing that this body is (fragile) like a jar, and making this thought firm like a fortress, one should attack Mara (the tempter) with the weapon of knowledge, one should watch him when conquered, and should never rest.