We are to admit no more causes of natural things than such as are both true and sufficient to explain their appearances.
Sentiment: POSITIVE
Nothing prevents one from appearing natural as the desire to appear natural.
Evolution is an indispensable component of any satisfying explanation of our psychology.
What we observe is not nature itself, but nature exposed to our method of questioning.
I hold that the mark of a genuine idea is that its possibility can be proved, either a priori by conceiving its cause or reason, or a posteriori when experience teaches us that it is in fact in nature.
I crave and seek a natural explanation of all phenomena upon this earth, but the word 'natural' to me implies more than mere chemistry and physics. The birth of a baby and the blooming of a flower are natural events, but the laboratory methods forever fail to give us the key to the secret of either.
We humans have a tendency to see ourselves as completely different from other animals, and the way in which large segments of the public continue to reject the theory of evolution is just one symptom of that malaise.
Things are not always as they seem; the first appearance deceives many.
The assumption that nature is all there is, and that nature has been governed by the same rules at all times and places, makes it possible for natural science to be confident that it can explain such things as how life began.
Natural objects, for example, must be experienced before any theorizing about them can occur.
Every natural fact is a symbol of some spiritual fact.