Ninety percent of the friction of daily life is caused by tone of voice.
The gain in self-confidence of having accomplished a tiresome labour is immense.
We need a sense of the value of time - that is, of the best way to divide one's time into one's various activities.
It is within the experience of everyone that when pleasure and pain reach a certain intensity they are indistinguishable.
Being a husband is a whole-time job.
Concentrate on something useful. Having decided to achieve a task, achieve it at all costs.