Is it right to probe so deeply into Nature's secrets? The question must here be raised whether it will benefit mankind or whether the knowledge will be harmful.
It has been a privilege to pursue knowledge for its own sake and to see how it might help mankind in more practical ways.
The most wonderful study of mankind is man. Relieving human suffering and diffusing universal knowledge is humanitarian.
A great many things which in times of lesser knowledge we imagined to be superstitious or useless prove today on examination to have been of immense value to mankind.
Music is the one incorporeal entrance into the higher world of knowledge which comprehends mankind but which mankind cannot comprehend.
Three passions simple but overwhelmingly strong have governed my life: the longing for love the search for knowledge and unbearable pity for the suffering of mankind.
Reputation is favorable notoriety as distinguished from fame which is permanent approval of great deeds and noble thoughts by the best intelligence of mankind.
Play is the only way the highest intelligence of humankind can unfold.
Every heart that has beat strongly and cheerfully has left a hopeful impulse behind it in the world and bettered the tradition of mankind.
Thought is the wind knowledge the sail and mankind the vessel.
The march of invention has clothed mankind with powers of which a century ago the boldest imagination could not have dreamt.
Jehovah God is truly rich far beyond the imagination of humankind.
Imagination has brought mankind through the dark ages to its present state of civilization. Imagination led Columbus to discover America. Imagination led Franklin to discover electricity.
In prehistoric times mankind often had only two choices in crisis situations: fight or flee. In modern times humor offers us a third alternative fight flee - or laugh.
Humor is mankind's greatest blessing.
Black and white are the colors of photography. To me they symbolize the alternatives of hope and despair to which mankind is forever subjected.
In most of mankind gratitude is merely a secret hope of further favors.