Nature is good, but intellect is better, as the law-giver is before the law-receiver.

The soul comes from without into the human body, as into a temporary abode, and it goes out of it anew… it passes into other habitations, for the soul is immortal.

I think it is the best of humanity that goes out to walk. In happy hours, I think all affairs may be wisely postponed for walking.

We learn geology the morning after the earthquake.

We resent all criticism which denies us anything that lies in our line of advance.

I am grown by sympathy a little eager and sentimental, but leave me alone, and I should relish every hour and what it brought me, the pot-luck of the day, as heartily as the oldest gossip in the bar-room.

There is really no insurmountable barrier save your own inherent weakness of purpose.