A thick skin is a gift from God.

The man who can drive himself further once the effort gets painful is the man who will win.

What this power is I cannot say; all I know is that it exists and it becomes available only when a man is in that state of mind in which he knows exactly what he wants and is fully determined not to quit until he finds it.

I am doing a great work and I cannot come down. Why should the work stop while I leave it and come down to you?

Firmness in enduring and exertion is a character I always wish to possess. I have always despised the whining yelp of complaint and cowardly resolve.

The longer I live, the more I am certain that the great difference between the great and the insignificant, is energy -- invincible determination -- a purpose once fixed, and then death or victory.

You can do what you have to do, and sometimes you can do it even better than you think you can.

Not an inch of our territory not a stone of our fortress.

There's no ceiling on effort!

Nothing great will ever be achieved without great men, and men are great only if they are determined to be so.

A determined soul will do more with a rusty monkey wrench than a loafer will accomplish with all the tools in a machine shop.

The difference between the impossible and the possible lies in a person's determination.

The price of success is hard work, dedication to the job at hand, and the determination that whether we win or lose, we have applied the best of ourselves to the task at hand.

To him who is determined it remains only to act.

A man can do anything he wants to do in this world, at least if he wants to do it badly enough.

The wayside of business is full of brilliant men who started out with a spurt, and lacked the stamina to finish. Their places were taken by patient and unshowy plodders who never knew when to quit.

Once while St. Francis of Assisi was hoeing his garden, he was asked, "What would you do it you were suddenly to learn that you were to die at sunset today?" He replied, "I would finish hoeing my garden."