It is of great use to the sailor to know the length of his line, though he cannot with it fathom all the depths of the ocean.

—John Locke

Every person takes the limits for their own field of vision for the limits of the world.

—Arthur Schopenhauer

Do just once what others say you can’t do, and you will never pay attention to their limitations again.

—James R. Cook

All of us are, to some extent, victims of what we are. We are not limited by our imaginations, but by our ability to do what we imagine. We are not too often limited by our abilities as much as by circumstances. And we are not as often limited by our circumstances as much as by the lack of the will to respond.

—Dee Bowman

Learning too soon our limitations, we never learn our powers.

—Mignon McLaughlin

Of course we all have our limits, but how can you possibly find your boundaries unless you explore as far and as wide as you possibly can? I would rather fail in an attempt at something new and uncharted than safely succeed in a repeat of something I have done.

—A.E. Hotchner

The only limit to our realization of tomorrow will be our doubts of today. Let us move forward with strong and active faith.

—Franklin D. Roosevelt

Learn to limit yourself, to content yourself with some definite work, dare to be what you are and learn to resign with a good grace all that you are not.

 —Henri Frederic Amiel

The richness of the human experience would lose something of rewarding joy if there were no limitations to overcome.

—Helen Keller

There is only one nature — the division into science and engineering is a human imposition, not a natural one. Indeed, the division is a human failure; it reflects our limited capacity to comprehend the whole.

—Bill Wulf

The world owes all its onward impulses to men ill at ease. The happy man inevitably confines himself within ancient limits.

—Nathaniel Hawthorne

You are never really playing against an opponent. You are playing against yourself, your own highest standards. And when you reach your limits, that is real joy.

—Arthur Ashe

There are no limits to either time or distance, except as man himself may make them. I have but to touch the wind to know these things.

—Hal Borland