Here are some more quotations I found doing my cryptogram puzzles:

“Even if you're on the right track, you'll get run over if you just sit there.” Will Rogers, humourist and entertainer (1879-1935)
“And we should consider every day lost on which we have not danced at least once. And we should call every truth false which is not accompanied by at least one laugh.” Friedrich Nietzsche, philosopher (1844-1900)

“All I ask is the chance to prove that money can't make me happy.” Spike Milligan, comedian (1918- 2002)

“There are painters who transform the sun to a yellow spot, but there are others who, with the help of their art and their intelligence, transform a yellow spot into the sun.” Pablo Picasso, artist (1881- 1973)

“What really knocks me out is a book that when you're done reading it, you wish the author that wrote it was a terrific friend of yours and you could call him up on the phone whenever you felt like it.” JD Salinger author (1919-2010)

“Power is like being a lady... If you care to tell people you are, you aren't.” Margaret Thatcher, former prime minister (1925-2013)

“Just because your voice reaches halfway around the world doesn't mean you are wiser than when it reached only to the end of the war.” Edward R Murrow, American broadcaster and journalist (1908 – 1965)

“The value of life lies, not in the length of days, but in the use we make of them; a man may live long, yet live very little.” Michelle de Montaigne, philosopher (1533 – 1592)

“A man who is good enough to shed his blood for his country is good enough to be given a square deal afterwards. More than that no man is entitled to and less than that no man shall have.” Theodore Roosevelt, 26th president of the USA (1858 – 1919)

“One thing life has taught me: if you are interested, you never have to look for new interests. They come to you. When you are genuinely interested in one thing, it will always lead to something else.” Eleanor Roosevelt, political figure and diplomat (1884 – 1962)

“When the Women's Institute started at the turn of the century they were determined to cross class barriers. One president reported with satisfaction: ‘We have done very well: we have elected five ladies, five women and one schoolteacher’ “quoted in Jam and Jerusalem by Simon Goodenough

“The only thing that sustains one through life is the consciousness of the immense inferiority of everybody else, and this is a feeling that I have always cultivated.” Oscar Wilde, poet and playwright.

“If you are not an idealist by the time you are 20, you don't have a heart, but if you are still an idealist by 30 you don't have a head.” Randolph Bourne, writer and intellectual

“When one door closes another opens, but we often look so long and so regretfully upon the closed door that we do not see the one which is opened for us”. Alexander Graham Bell, inventor and scientist.

“The sun with all its planets revolving around it and dependent on it, can still ripen a bunch of grapes as if it had nothing else in the universe to do.” Galileo Galilei, physicist and astronomer

“Say all you have to say in the fewest possible words, or your reader will be sure to skip them; and in the plainest possible words or he will certainly misunderstand them.” John Ruskin, writer, art historian and critic.

“I am among those who think that science has great beauty. A scientist in his laboratory is not only a technician: he is also a child placed before natural phenomena which impress him like a fairy tale.” Marie Curie physicist and chemist (1867 to 1934)

“How inappropriate to call this planet Earth when it is quite clearly ocean.” Arthur C Clarke

“When you think of the long and gloomy history of man, you will find more hideous crimes have been committed in the name of obedience than have ever been committed in the name of rebellion.” CP Snow, novelist and chemist (1905 - 1980)

“There are three principal means of acquiring knowledge… observation of nature, reflection and experimentation. Observation collects facts, reflection combines them; experimentation verifies the result.” Denis Diderot, philosopher and writer (1713- 1784)

“Emergencies have always been necessary to progress. It was darkness which produced the lamp. It was fog that produced the compass. It was hunger that drove us to exploration. And it took a depression to teach us the real value of a job.” Victor Hugo, writer and politician (1802-1885)

“It may make your blood boil and your mind may not be changed, but the practise of listening to opposing views is essential for effective citizenship. It is essential for our democracy.” Barack Obama 44th president of the USA (b 1961)

“For an actress to be a success, she must have the face of a Venus, the brains of a Minerva, the grace of Terpsichore, the memory of a McCauley, the figure of Juno and the hide of a rhinoceros.” Ethel Barrymore, actress (1879 – 1959)

“Vanity and pride are two different things, though the words are often used synonymously. Pride relates more to our opinion of ourselves, vanity to what we would have others think of us.” Jane Austen, novelist (1775-1817)

“There are two possible outcomes: if the result confirms the hypothesis then you've made a measurement. If the result is contrary to the hypothesis then you've made a discovery.” Enrico Fermi, physicist (1901- 1954)

“When you are courting a nice girl an hour seems like a second. When you sit on a red-hot cinder a second seems like an hour. That's relativity.“ Albert Einstein, physicist (1879-1955)

“Prediction is very difficult especially if it's about the future.” Niels Bohr

“We must be willing to let go of the life we have planned so as to have the life that is waiting for us.” E M Forster

“Don't worry about the world coming to an end today. It's already tomorrow in Australia.” Charles M Schultz