Injustice alone can shake down the pillars of the skies, and restore the reign of Chaos and Night.

Every addition to true knowledge is an addition to human power.

Astronomy is one of the sublimest fields of human investigation. The mind that grasps its facts and principles receives something of the enlargement and grandeur belonging to the science itself. It is a quickener of devotion.

Superiority to circumstances is one of the most prominent characteristics of great men.

Without undervaluing any other human agency, it may be safely affirmed that the Common School, improved and energized, as it can easily be, may become the most effective and benignant of all the forces of civilization. Two reasons sustain this position. In the first place, there is a universality in its operation, which can be affirmed of no other institution whatever... And, in the second place, the materials upon which it operates are so pliant and ductile as to be susceptible of assuming a greater variety of forms than any other earthly work of the Creator.

Schoolhouses are the republican line of fortifications.

Observation - activity of both eyes and ears.