Never memorize something that you can look up.
A man who dares to waste one hour of time has not discovered the value of life.
Somewhere, something incredible is waiting to be known.
Anything that gives us new knowledge gives us an opportunity to be more rational.
A concept is a brick. It can be used to build a courthouse of reason. Or it can be thrown through the window.
Natural science does not simply describe and explain nature: it is part of the interplay between us and nature.
I would rather have questions that can’t be answered than answers which can’t be questioned.
Prayers without accordant action are silent lies told to oneself, heard by no God, amounting to nothing. Action is the language of truth, the prayers of the Saints.
Time and space are modes by which we think and not conditions in which we live.
That which can be asserted without evidence, can be dismissed without evidence.