There is no substitute for hard work.
Thomas A. Edison

The reason a lot of people do not recognize opportunity is because it usually goes around wearing overalls looking like hard work.
Thomas A. Edison

The three great essentials to achieve anything worth while are: Hard work, Stick-to-itiveness, and Common sense.
Thomas A. Edison

Death is a release from the impressions of the senses, and from desires that make us their puppets, and from the vagaries of the mind, and from the hard service of the flesh.
Marcus Aurelius

A human being has so many skins inside, covering the depths of the heart. We know so many things, but we don't know ourselves! Why, thirty or forty skins or hides, as thick and hard as an ox's or bear's, cover the soul. Go into your own ground and learn to know yourself there.
Meister Eckhart

In order to acquire a growing and lasting respect in society, it is a good thing, if you possess great talent, to give, early in your youth, a very hard kick to the right shin of the society that you love. After that, be a snob.
Salvador Dali

I wanted a perfect ending. Now I've learned, the hard way, that some poems don't rhyme, and some stories don't have a clear beginning, middle and end.
Gilda Radner

Never ever discount the idea of marriage. Sure, someone might tell you that marriage is just a piece of paper. Well, so is money, and what's more life-affirming than cold, hard cash?
Dennis Miller

As the poet said, 'Only God can make a tree,' probably because it's so hard to figure out how to get the bark on.
Woody Allen

I'm astounded by people who want to 'know' the universe when it's hard enough to find your way around Chinatown.
Woody Allen

One of the things I learned the hard way was that it doesn' t pay to get discouraged. Keeping busy and making optimism a way of life can restore your faith in yourself.
Lucille Ball

Luck? I don't know anything about luck. I've never banked on it and I'm afraid of people who do. Luck to me is something else: Hard work - and realizing what is opportunity and what isn't.
Lucille Ball

In life, all good things come hard, but wisdom is the hardest to come by.
Lucille Ball

It is so hard to believe because it is so hard to obey.
Soren Kierkegaard

They died hard, those savage men - like wounded wolves at bay. They were filthy, and they were lousy, and they stunk. And I loved them.
Douglas MacArthur

I learned the value of hard work by working hard.
Margaret Mead

To hard necessity ones will and fancy must conform.
Johann Wolfgang von Goethe

Must is a hard nut to crack, but it has a sweet kernel.
Charles Spurgeon

No human being will work hard at anything unless they believe that they are working for competence.
William Glasser

Once you hear the details of victory, it is hard to distinguish it from a defeat.
Jean-Paul Sartre