Self-respect is the cornerstone of all virtue.

There is a pinciple in the heart of music which has yet to be discovered.

To the natural philosopher, there is no natural object unimportant or trifling. From the least of Nature's works he may learn the greatest lessons.

Almost all the greatest discoveries in astronomy have resulted from what we have elsewhere termed Residual Phenomena, of a qualitative or numerical kind, of such portions of the numerical or quantitative results of observation as remain outstanding and unaccounted for, after subducting and allowing for all that would result from the strict application of known principles.

The stars are the land-marks of the universe.

Were I to pray for a taste which should stand me in good stead under every variety of circumstances and be a source of happiness and a cheerfulness to me during life and a shield against its ills, however things might go amiss and the world frown upon me, it would be a taste for reading.

Man is constituted as a speculative being; he contemplates the world, and the objects around him, not with a passive indifferent eye, but as a system disposed with order and design.