Hypotheses are the scaffolds which are erected in front of a building and removedd when the building is completed. They are indispensable to the worker; but the worker must not mistake the scaffolding for the building.

When young, one is confident to be able to build palaces for mankind, but when the time comes one has one's hands full just to be able to remove their trash.

It would be a lowly art that allowed itself to be understood all at once.

With little art, clear wit and sense Suggest their own delivery.

Science has been seriously retarded by the study of what is not worth knowing and of what is not knowable.

Women are silver dishes into which we put golden apples.

Great necessity elevates man, petty necessity casts him down