Mount Rushmore National Memorial was started 90 years ago in 1927 and completed in 1941.

Mount Rushmore National Memorial is a sculpture carved into the granite face of Mount Rushmore, in the Black Hills in Keystone, South Dakota and features sculptures of the heads of four United States Presidents: George Washington (1732–1799), Thomas Jefferson (1743–1826), Theodore Roosevelt (1858–1919), and Abraham Lincoln (1809–1865).

To celebrate this majestic monument, here are a dozen inspiring quotes from the men whose faces and words are etched in stone:

Do you want to know who you are? Don’t ask. Act! Action will delineate and define you.―Thomas Jefferson

Honesty is the first chapter of the book wisdom.―Thomas Jefferson

The most valuable of all talents is that of never using two words when one will do.―Thomas Jefferson

On matters of style, swim with the current, on matters of principle, stand like a rock.―Thomas Jefferson

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I will prepare and some day my chance will come.―Abraham Lincoln

And in the end, it’s not the years in your life that count. It’s the life in your years.―Abraham Lincoln

Always bear in mind that your own resolution to succeed, is more important than any other one thing.―Abraham Lincoln

You cannot escape the responsibility of tomorrow by evading it today.―Abraham Lincoln

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Do what you can, with what you have, where you are.―Theodore Roosevelt

Believe you can and you’re halfway there.―Theodore Roosevelt

People don’t care how much you know until they know how much you care.―Theodore Roosevelt

Knowing what’s right doesn’t mean much unless you do what’s right.―Theodore Roosevelt

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Labor to keep alive in your breast that little spark of celestial fire called conscience.―George Washington

Human happiness and moral duty are inseparably connected.―George Washington

Strive not with your superiors in argument, but always submit your judgment to others with modesty.― George Washington

Perseverance and spirit have done wonders in all ages.― George Washington

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Originally published at medium.com