There is this phrase, "Dimaag ki dahi banna". It is technically quite sound in a sense. Imagine your brain like a pot of milk. It is good but it's good only till you introduce half a teaspoonful curd starter into it. It can be any damn disturbing thought, just a small morsel and then you see the metamorphosis. Slowly this small weird disturbing thought will convert the normal thing in your brain into curd, the whole content will become disturbing. But there are certain conditions to be followed 1. The brain should not be at peace when you give it the starter neither should it get cold fast while the fermentation is on. A highly lukewarm milk aka brain is essential. Keep it hot. Put it in casserole , that's better isolated from the influence of any cool air, positive ideas or sensible people. 2. Give it time. Sufficient time to rake past, present, future, dissect behavior of people, what they have done/not done. Once your brain gets that time it will curdle. ...