If we insist on being as sure as is conceivable... we must be content to creep along the ground, and never soar.
Sentiment: POSITIVE
That though we are certain of many things, yet that Certainty is no absolute Infallibility, there still remains the possibility of our being mistaken in all matters of humane Belief and Inquiry.
There are grounds for cautious optimism that we may now be near the end ofthe search for the ultimate laws of nature.
People need to be cautious because anything built by man can be destroyed by Mother Nature.
To believe with certainty we must begin with doubting.
We can be absolutely certain only about things we do not understand.
One can never consent to creep when one feels an impulse to soar.
The progress of the natural sciences in modern times has of course so much exceeded all expectations that any suggestion that there may be some limits to it is bound to arouse suspicion.
Science has proof without any certainty. Creationists have certainty without any proof.
When nothing is sure, everything is possible.
When we are not sure, we are alive.