The important thing in life is to have a great aim , and the determination to attain it (Johan Wolfgang von Goethe , German Poet and dramatist)

Keep on going never give up

It is difficulties that show what men are——Epictetus

The world can be changed by man's endeavor, and that this endeavor can lead to something new and better No man can sever the bonds that unite him to his society simply by averting his eyes He must ever be receptive and sensitive to the new ; and have sufficient courage and skill to novel facts and to deal with them (Franklin Roosevelt , American President )

Don’t part with your illusions When they are gone you may still exist, but you have ceased to live——Mark Twain

Never put off what you can do today until tomorrow

Living without an aim is like sailing without a compassAlexander Dumas (Davy de La Pailleterie, French Writer)

I want to bring out the secrets of nature and apply them for the happiness of man I don't know of any better service to offer for the short time we are in the world (Thomas Edison , American inventor)

Do not,for one repulse, give up the purpose that you resolved to effect——William Shakespeare

The only limit to our realization of tomorrow will be our doubts of today (Franklin Roosevelt , American president)

The man with a new idea is a crank until the idea succeeds (Mark Twain ,American writer)

Never forget to say "thanks"

The only reward of virtue is virtue; the only way to have a friend is to be one——Emerson

Never say die