Nature does not do anything in vain.
Stagira, Greece
All men by nature desire to know.
In every systematic inquiry where there are first principles, or causes, or elements, knowledge and science result from acquiring knowledge of these.
We are what we repeatedly do. Excellence, then, is not an act, but a habit.
I believe a leaf of grass is no less than the journey-work of the stars.
Nature is to be found in her entirety nowhere more than in her smallest creatures.
In the great chain of causes and effects, no single fact can be considered in isolation.