Only the one who does not question is safe from making a mistake.
The environment is everything that isn't me.
Galileo - the father of modern physics - indeed of modern science.
Schools need not preach political doctrine to defend democracy. If they shape men capable of critical thought and trained in social attitudes, that is all that is necessary.
I think that only daring speculation can lead us further and not accumulation of facts.
Common sense invents and constructs no less than its own field than science does in its domain. It is, however, in the nature of common sense not to be aware of this situation.