A Discovery is great, if it is a fact whose appearance in science gives rise to shining ideas, whose light dispels many obscurities and shows us new paths.

Discovery is secondary to persuasion — In science the credit goes to the man who convinces the world, not to the man to whom the idea first occurs.

Discovery is seeing what everybody has seen and thinking what nobody has thought.

Discovery is the ability to be puzzled by simple things.

Evidence is generalizable — You may know by a handful the whole sack.

Evidence is the substance of things of things not seen.

Evidence is sometimes as good as proof — One swallow does not make a summer, but one camel makes a desert.

Evidence is not equivalent to proof — One swallow does not make a spring, nor does one fine day.

Trace is the residue in the signifier of the excluded, differentiating term which constitutes the only source of its meaning.

A Trace is a kind of faint gush inscribed upon time.

A Trace is the unconscious 'grain of truth' in every projection.

The Trace is the part played by the radically other within the structure of difference that is the sign.