"The utility of a science which enables men to take cognizance of the travellers on the mind's highway, and excludes those disorderly interlopers, verbal fallacies, needs but small attestation. Its searching penetration by definition alone, before which even mathematical precision fails, would especially commend it to those whom the abstruseness of the study does not terrify, and who recognise the valuable results which must attend discipline of mind. Like a medicine, though not a panacea for every ill, it has the health of the mind for its aim, but requires the determination of a powerful will to imbibe its nauseating yet wholesome influence: it is no wonder therefore that puny intellects, like weak stomachs, abhor and reject it."

"The investigation of the form and brightness of the rings or rays surrounding the image of a star as seen in a good telescope, when a diaphragm bounded by a rectilinear contour is placed upon the obje…"

"The Sultan is not slack in jihad. He never lets go of his spear or bridle in pursuing jihad by land and sea routes. This is his main occupation which engages his eyes and ears. He has spent vast sums …"

"Central America’s highest value as a natural phenomenon may be not in its diversity and adaptations, priceless as those are, but in its powerful demonstration of life’s sphericality. Life would have b…"

"Minds are in limited supply, and each mind has a limited capacity for memes, and hence there is considerable competition among memes for entry in as many minds as possible. This competition is the maj…"