"The material which a scientist actually has at his disposal, his laws, his experimental results, his mathematical techniques, his epistemological prejudices, his attitude towards the absurd consequences of the theories which he accepts, is indeterminate in many ways, ambiguous, and never fully separated from the historical background . This material is always contaminated by principles which he does not know and which, if known, would be extremely hard to test."

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Grace is in a great measure a natural gift; elegance implies cultivation; or something of more artificial character. A rustic, uneducated girl may be graceful, but an elegant woman must be accomplished and well trained. It is the same with things as with persons; we talk of a graceful tree, but of an elegant house or other building. Animals may be graceful, but they cannot be elegant. The movements of a kitten or a young fawn are full of grace; but to call them "elegant" animals would be absurd.

— Richard Whately