The human brain is much faster and better organised than computers because contrary to computers it can think, it can feel, it has emotions, etc. Everything that makes playing chess so fascinating for us humans is well beyond the reach of computers.
--David Bronstein,
My experience with computers,
Advances in Computer Chess 8, H.J. van den Herik and
J.W.H.M Uiterwijk, editors, Universteit Maastricht, Netherlands,
1997, 27--44.