"Concentration is the ability to think about absolutely nothing when it is absolutely necessary." -- Ray Knight
"Eventually, meditation will make our mind calm, clear, and as concentrated as a laser which we can focus at will. This capacity of one-pointed attention is the essence of genius. When we have this mastery over attention in everything we do, we have a genius for life itself: unshakable security, clear judgment, and deep personal relationships." -- Eknath Easwaran
"The successful man is the average man, focused." -- Source Unknown
