Two things fill my mind with ever-increasing wonder and awe, the more often and the more intensely the reflection dwells on them: the starry heavens … - Immanuel Kant

Következőleg a háborúba önmagában valami belső méltóságot helyeznek, annyira, hogy annak olykor még filozófusok is, mint az emberiség bizonyos megnemesülésének, dicsőítő beszédet tartanak, megfeledkezve ama görögnek mondásáról: „A háború abban rossz, hogy több rossz embert csinál, mint amennyit elpusztít.

The more we devote ourselves to observing animals and their behaviour, the more we love them, on seeing how gready they care for their young; in such a context, we cannot even contemplate cruelty to a wolf. Leibnitz put the grub he had been observing back on the tree with its leaf, lest he should be guilty of doing any harm to it. It upsets a man to destroy such a creature for no reason, and this tenderness is subsequently transferred to man.

In every department of physical science there is only so much science, properly so-called, as there is mathematics.