A man to get through work well must not overwork himself; or, if he do too much to-day, the reaction of fatigue will come, and he will be obliged to do too little to-morrow.
Now, since I began really and earnestly to study, which was not till I had left college, and was actually in the world, I may perhaps say that I have gone through as large a course of general reading as most men of my time.

I have traveled much and I have seen much; I have mixed much in politics, and in the various business of life; and in addition to all this, I have published somewhere about sixty volumes, some upon subjects requiring much special research.

And what time do you think, as a general rule, I have devoted to study, to reading, and writing?
Not more than three hours a day; and, when Parliament is sitting, not always that.

But then, during these three hours, I have given my whole attention to what I was about." "The things that are crowded out of a life are the test of that life.
Not what we would like, but what we long for and strive for with all our might we attain." "One great cause of failure of young men in business," says Carnegie, "is lack of concentration.

They are prone to seek outside investments.
The cause of many a surprising failure lies in so doing.