Life is infinitely stranger than anything which the mind of man could invent.
The world is full of obvious things which nobody by any chance ever observes.
Healthy scepticism is the basis of all accurate observation.
When the impossible has been eliminated, all that remains no matter how improbable is possible.
You yourself may not be luminous, but you are a conductor of light.
It is a capital mistake to theorize before one has data. Insensibly one begins to twist facts to suit theories, instead of theories to suit facts.
The most dangerous condition for a man or a nation is when his intellectual side is more developed than his spiritual. Is that not exactly the condition of the world today?
When the spirits are low, when the day appears dark, when work becomes monotonous, when hope hardly seems worth having, just mount a bicycle and go out for a spin down the road, without thought on anything but the ride you are taking.
You see, but you do not observe.
Mediocrity knows nothing higher than itself, but talent instantly recognizes genius.
The weak man becomes strong when he has nothing, for then only can he feel the wild, mad thrill of despair.
There is nothing more deceptive than an obvious fact.
A dog reflects the family life. Whoever saw a frisky dog in a gloomy family, or a sad dog in a happy one? Snarling people have snarling dogs, dangerous people have dangerous ones.
It is a fool's plan to teach a man to be a cur in peace, and think that he will be a lion in war.
Skill is fine, and genius is splendid, but the right contacts are more valuable than either.
So tomorrow we disappear into the unknown. This account I am transmitting down the river by canoe, and it may be our last word to those who are interested in our fate.
Several incidents in my life have convinced me of spiritual interposition - of the promptings of some beneficent force outside ourselves, which tries to help us where it can.
The love of books is among the choicest gifts of the gods.
Education never ends, Watson. It is a series of lessons, with the greatest for the last.
Any truth is better than indefinite doubt.
Do you know anything on earth which has not a dangerous side if it is mishandled and exaggerated?
There is nothing like first-hand evidence.
How sweet the morning air is! ...How small we feel with our petty ambitions and strivings in the presence of the great elemental forces of Nature!
What you do in this world is a matter of no consequence. The question is, what can you make people believe that you have done?
Depend upon it there comes a time when for every addition of knowledge you forget something that you knew before. It is of the highest importance, therefore, not to have useless facts elbowing out the useful ones.
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