It's so much darker when a light goes out than it would have been if it had never shone.

最大的幸福是将自己的感受转化为行动。

There is nothing which I dread so much as a division of the republic into two great parties, each arranged under its leader, and concerting measures in opposition to each other.

The essence of philosophy is not the possession of truth but the search for truth.

The mind's work is never done, because adaptation is never complete.