Virtue is an angel, but she is a blind one, and must ask Knowledge to show her the pathway that leads to her goal.

Be careful never to retire to rest in a room not properly ventilated.

Be ashamed to die until you have won some victory for humanity.

Both poetry and philosophy are prodigal of eulogy over the mind which ransoms itself by its own energy from a captivity to custom, which breaks the common bounds of empire, and cuts a Simplon over mountains of difficulty for its own purposes, whether of good or of evil.

As each generation comes into the world devoid of knowledge, its first duty is to obtain possession of the stores already amassed. It must overtake its predecessors before it can pass by them.

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.

The pulpit only "teaches" to be honest; the market-place "trains" to overreaching and fraud; and teaching has not a tithe of the efficiency of training. Christ never wrote a tract, but He went about doing good.