The three great essentials to achieve anything worthwhile are: Hard work‚ Stick-to-itiveness, and Common sense  

— Thomas A. Edison

The ability to concentrate and to use your time well is everything if you want to succeed in business - or almost anywhere else for that matter 

— Lee Iacocca

The talent of success is nothing more than doing what you can do, well 

— Henry W. Longfellow

We don’t see things the way they are, we see things the way we are 

— Talmud

Happiness resides not in possessions and not in gold; the feeling of happiness dwells in the soul 

— Democritus

You can never quit. Winners never quit‚ and quitters never win  

— Ted Turner

Let us strive to improve ourselves, for we cannot remain stationary; one either progresses or retrogrades 

— Mme. Du Deffand

People don’t care how much you know, until they know how much you care about them 

— Zig Ziglar

Do not wait to strike till the iron is hot; but make it hot by striking 

— William B. Sprague

Never neglect an opportunity for improvement 

— Sir William Jones

They can because they think they can 

— Virgil

The more difficulties one has to encounter, within and without, the more significant and the higher in inspiration his life will be 

— Horace Bushnell

The price of excellence is discipline, the cost of mediocrity is disappointment 

— William Arthur Ward

Surmounting difficulty is the crucible that forms character  

— Tony Robbins

Collect as precious pearls the words of the wise and virtuous 

— Abd-el-Kadar

The only real mistake is the one from which we learn nothing 

—  John Powell

Obstacles are those frightful things you see when you take your eyes off your goals 

— Anonymous

What you get by achieving your goals is not as important as what you become by achieving your goals 

— Goethe

The smallest actual good is better than the most magnificent promise of impossibilities 

— Thomas Babington Macaulay

The longer we dwell on our misfortunes‚ the greater is their power to harm us 

— Voltaire