Our frustration is greater when we have much and want more than when we have nothing and want some. We are less dissatisfied when we lack many things than when we seem to lack but one thing.

The good life is not found in luxury, but in the freedom to choose our own path.

心理学家必须避免一切形而上的假设。

预测未来的最好方法就是发明它。

品格比恢复更容易保持。