People of mediocre ability sometimes achieve outstanding success because they don't know when to quit. Most men succeed because they are determined to

Success is that old ABC -- ability, breaks, and courage

For success, attitude is equally as important as ability

Success begins with belief and ends with doubt.

They can conquer who believe they can

I believe that the true road to preeminent success in any line is to make yourself master of that line

Our belief at the beginning of a doubtful undertaking is the one thing that assures the successful outcome of any venture

Firmness of purpose is one of the most necessary sinews of character, and one of the best instruments of success. Without it genius wastes its efforts in a maze of inconsistencies

One of the most important lessons that experience teaches is that, on the whole, success depends more upon character than upon either intellect or fortune

Successful action tends to become an end in itself