It isn't what you have or who you are or where you are or what you are doing that makes you happy or unhappy. It is what you think about it.

Don't be afraid of enemies who attack you. Be afraid of the friends who flatter you.

One of the tragic things I know about human nature is that all of us tend to put off living. We are all dreaming of some magical rose garden over the horizon - instead of enjoying the roses that are blooming outside our windows today.

Are you bored with life? Then throw yourself into some work you believe in with all your heart, live for it, die for it, and you will find happiness that you had thought could never be yours.

Today is life - the only life you are sure of. Make the most of today. Get interested in something. Shake yourself awake. Develop a hobby. Let the winds of enthusiasm sweep through you. Live today with gusto

Flaming enthusiasm, backed up by horse sense and persistence, is the quality that most frequently makes for success.

Everybody in the world is seeking happiness - and there is one sure way to find it. That is by controlling your thoughts. Happiness doesn't depend on outward conditions. It depends on inner conditions.

Anyone can do his work, however hard, for one day. Anyone can live sweetly, patiently, lovingly, purely, till the sun goes down. And this is all that life really means.

Almost all the progress ever made in human thought has been made by the Doubting Thomas's, the questioners, the challengers, the show-me crowd.