I have heard long ago from a forgotten source that the Buddha one time said “war against mental defilements (or mind) is more difficult than a war against all armies of the world.”
Tried to find this in Pali scriptures but whatever I get is not as explicit as this. Maximum I get a mention that monks should wage war against their defilements (no comparison with a war against all armies of the world).
I might remember this quote wrong, it might not exist anywhere in any scripture. But I still believe that I really heard it from a trustworthy source. Can anybody help me get the exact (or the closest) quote in the Pali texts?