The man of petty ambition if invited to dinner will be eager to be set next his host.

Slovenliness is a lazy and beastly negligence of a man's own person, whereby he becomes so sordid as to be offensive to those about him.

Superstition would seem to be simply cowardice in regard to the supernatural.

Our costliest expenditure is time.

Alcmaeon was the first to define the difference between man and animals, saying that man differs from the latter in the fact that he alone has the power of understanding.

True friends visit us in prosperity only when invited, but in adversity they come without invitation.

We must consider the distinctive characters and the general nature of plants from the point of view of their morphology , their behavior under external conditions, their mode of generation, and the whole course of their life.