Knowledge is power.
While the true origin of that famous quote is unknown (possibly Sir Francis Bacon), science has recently given some credence to it.
Scientists have named this: Neuroplasticity. Crazy word right?! Studies suggest that strengthening neural pathways (imagine freeways in your brain) through resistance training and methods of exercise such as Pilates by which you have to truly focus and concentrate, you could increase the brains plasticity or strength. In turn, this could make you stronger AND smarter!
Now, go take care of your body. It's the only one you get!