Phineas Taylor Barnum (July 5, 1810 – April 7, 1891) was an American showman, politician and businessman remembered for promoting celebrated hoaxes and for founding the Barnum & Bailey Circus (1871–2017). Although Barnum was also an author, publisher, philanthropist, and for some time a politician, he said of himself, "I am a showman by profession...and all the gilding shall make nothing else of me," and his personal aim was "to put money in his own coffers." Barnum is widely, but erroneously, credited with coining the phrase "There's a sucker born every minute."Read about P. T. Barnum in Wikipedia
Constant hammering on one nail will generally drive it home at last, so that it can be clinched. When a man's undivided attention is centered on one object, his mind will constantly be suggesting improvements of value, which would escape him if his brain was occupied by a dozen different subjects at once.
Every man should make his son or daughter learn some useful trade or profession, so that in these days of changing fortunes of being rich today and poor tomorrow they may have something tangible to fall back upon. This provision might save many persons from misery, who by some unexpected turn of fortune have lost all their means.
Men, women, and children who cannot live on gravity alone need something to satisfy their gayer, lighter moods and hours, and he who ministers to this want is, in my opinion, in a business established by the Creator of our nature. If he worthily fulfills his mission and amuses without corrupting, he need never feel that he has lived in vain.
There is no such thing in the world as luck. There never was a man who could go out in the morning and find a purse full of gold in the street to-day, and another to-morrow, and so on, day after day: He may do so once in his life; but so far as mere luck is concerned, he is as liable to lose it as to find it.