Like the entomologist in search of colorful butterflies, my attention has chased in the gardens of the grey matter cells with delicate and elegant shapes, the mysterious butterflies of the soul, whose beating of wings may one day reveal to us the secrets of the mind.
— Santiago Ramon y Cajal
Devotion Grey Matter quotations
Types really don't matter. I have been accused of preferring blondes. But I have known some mighty attractive redheads, brunettes, and yes, women with grey hair. Age, height, weight haven't anything to do with glamour.

The more things change, the more they stay different.

What do you think my brain is made for? Is it just a container for the mind? This great grey matter, Sensei replied what is your woman, Is she just a container for the child? That soft pink matter
All that matters in life," the grey man went on, "is to climb the ladder of success, amount to something, own things. When a person climbs higher than the rest, amounts to more, owns more things, everything else comes automatically: friendship, love, respect, et cetera..." "Isn't there anyone who loves you?" Momo whispered.
There were two things going on: 1) I had already established in my own mind where I wanted to go with the next series, and having James around as a Grey Eminence would have complicated matters. He had had an amazing life and it was time to bid him good-bye.

Mind is not simply the collection of aggregate cells inside your brain.
If you are only the grey matter, then when that dies, you won't exist any more. It's not that easy. You exist forever.
This has been done elegantly by Minkowski;
but chalk is cheaper than grey matter, and we will do it as it comes.
I do the 'New York Times' crossword puzzle every morning to keep the old grey matter ticking.

There have been studies done on people who meditate and they have found that they actually have increased grey matter in certain parts of their brain and more neural conductivity, meaning more connections between certain parts of the brain. They have increased capacity for, in some cases, memory, or reasoning.
Frankly I don't listen to lyrics (a problem in that I apparently work in musical theatre) I just want a good tune that doesn't require the use of too much grey matter.
Intuition was not just visual but also auditory and kinesthetic.
Those who watched Feynman in moments of intense concentration came away with a strong, even disturbing sense of the physicality of the process, as though his brain did not stop with the grey matter but extended through every muscle in his body.

On your 60th, here's something philosophical To give the old grey matter a stir How old would you be If you didn't know how old you were?