Long whiskers cannot take the place of brains.
Brains Quotes
If you want to know if your brain is flabby, feel your legs.
The fact that a human brain of high amperage, otherwise highly efficient, may have a hole in it is surely not a secret.
Brain, n.: The apparatus with which we think that we think.
This wretched brain gave way, and I became a wreck at random driven, without one glimpse of reason or heaven.
One way to compensate for a tiny brain is to pretend to be dead. (“Dilbert”)