“إنني أعتقد أن هذا الكوكب تضيئه نافذة ذات ألوان، فهنا فرد ينظر من خلال اللون الأزرق، وآخر من خلال اللون الأحمر أو الأصفر، ولكن اللون في الخارج لون أبيض، والذين يرونه على حقيقته إنما هم الذين ينظرون من نافذة مفتوحة”

“Take your needle, my child, and work at your pattern; it will come out arose by and by. Life is like that - one stitch at a time taken patientlyand the pattern will come out all right like the embroidery.”

“The books we read should be chosen with great care, that they may be, as an Egyptian king wrote over his library,'The medicines of the soul.”

“Science is the topography of ignorance.”

“Science is a first-rate piece of furniture for a man's upper chamber, if he has common sense on the ground floor.”

“Men do not quit playing because they grow old; they grow old because they quit playing.”

“Every now and then a man's mind is stretched by a new idea or sensation, and never shrinks back to its former dimensions.”