In The Art of Money Getting, P.T. Barnum Wrote:

Engage in one kind of business only, and stick to it faithfully until you succeed, or until your experience shows that you should abandon it. A constant hammering on one nail will generally drive it home at last, so that it can be clinched. When a man’s [...]

This article contains passages from Orison Swett Marden’s An Iron Will.
In our day-to-day life, we do what we think about. We think about going to a movie, then we go. We think about what to wear, then we put it on. We start by thinking what we want for lunch, then before you know it, [...]

You have to believe in yourself first. If you don’t, no one else will. In his book An Iron Will Orison Swett Marden wrote:
The man without self-reliance and an iron will is the plaything of chance, the puppet of his environment, the slave of circumstances. Are not doubts the greatest of enemies? If you would [...]

In his book The Art of Money Getting, circus great P. T. Barnum writes:

Take two generals; both understand military tactics, both educated at West Point, if you please, both equally gifted; yet one, having this principle of perseverance, and the other lacking it, the former will succeed in his profession, while the latter will fail. [...]

In An Iron Will, by Orison Swett Marden we read:
We hear a great deal of talk about genius, talent, luck, chance, cleverness, and fine manners playing a large part in one’s success. Leaving out luck and chance, all these elements are important factors. Yet the possession of any or all of them, unaccompanied by a [...]

Finding true success is never easy. Greatness only arrives when we overcome obstacles.
In his book “An Iron Will”, Orison Swett Marden Relates:
“It is all very well,” said Charles J. Fox, “to tell me that a young man has distinguished himself by a brilliant first speech. He may go on satisfied with his first triumph; but [...]

Benjamin Franklin achieved financial success at a very young age. When he gave financial advice, he was not just spouting theory, but speaking from experience.
In his book, The Way To Wealth, we read:

Friends, says he, and neighbors, the taxes are indeed very heavy, and if those laid on by the government were the only ones [...]

In his book An Iron Will Orison Swett Marden Writes,

It is irresolution that is worse than rashness. “He that shoots,” says Feltham, “may sometimes hit the mark; but he that shoots not at all can never hit it.
…
The man who is forever twisting and turning, backing and filling, hesitating and dawdling, shuffling and parleying, weighing [...]