While Differing Widely In The

The Future Is Always Present, As A Promise, A Lure And A Temptation.

Reason Like Science, Grows By Way Of Mutual Criticism; The Only Possible Way Of Planning Its Growth Is To Develop Those Institutions That Safeguard. The Freedom Of Thought

The Growth Of Our Knowledge Is The Result Of A Process Closely Resembling What Darwin Called 'natural Selection'; That Is, The Natural Selection Of Hypotheses: Our Knowledge Consists, At Every Moment, Of Those Hypotheses Which Have Shown Their (comparative) Fitness By Surviving So Far In Their Struggle For Existence, A Competitive Struggle Which Eliminates Those Hypotheses Which Are Unfit.

Some Scientists Find, Or So It Seems, That They Get Their Best Ideas When Smoking; Others By Drinking Coffee Or Whisky. Thus There Is No Reason Why I Should Not Admit That Some May Get Their Ideas By Observing, Or By Repeating Observations.

The Initial Stage, The Act Of Conceiving Or Inventing A Theory, Seems To Me Neither To Call For Logical Analysis Nor To Be Susceptible Of It.