The man who has a conscience suffers whilst acknowledging his sin. That is his punishment.

In abstract love of humanity one almost always only loves oneself.

To strive consciously for an object and to engage in engineering -- that is, incessantly and eternally to make new roads, wherever they may lead.

Believe to the end, even if all men went astray and you were left the only one faithful; bring your offering even then and praise God in your loneliness.

At such times I felt something was drawing me away, and I kept fancying that if I walked straight on, far, far away and reached that line where the sky and earth meet, there I should find the key to the mystery, there I should see a new life a thousand times richer and more turbulent than ours.

Love the animals: God has given them the rudiments of thought and joy untroubled.

If you were to destroy the belief in immortality in mankind, not only love but every living force on which the continuation of all life in the world depended, would dry up at once.