In the deepest night of trouble and sorrow God gives us so much to be thankful for that we need never cease our singing. With all our wisdom and foresight we can take a lesson in gladness and gratitude from the happy bird that sings all night, as if the day were not long enough to tell its joy.

I attended [Sir Humphry] Davy's lectures to renew my stock of metaphors.

What! Did Sir W[alter] R[aleigh] believe that a male and female ounce (and, if so, why not two tigers and lions, etc?) would have produced, in a course of generations, a cat, or a cat a lion? This is Darwinizing with a vengeance.

I have often thought what a melancholy world this would be without children, and what an inhuman world without the aged.

I feel as if God had, by giving the Sabbath, given fifty-two springs in every year.

We have no adequate conception of the perfection of the ancient tragic dance. The pleasure which the greeks received from it had for its basis difference; & the more unfit the vehicle, the more lively was the curiosity & intense the delights at seeing the difficulty overcome.

Motives are symptoms of weakness, and supplements for the deficient energy of the living principle, the law within us. Let them then be reserved for those momentous acts and duties in which the strongest and best-balanced natures must feel themselves deficient, and where humility no less than prudence prescribes deliberation.