Here are some of my favourite quotes about truth,
and about cause and effect:

Man who stand on hill with mouth open will wait long time for roast duck to fly in.
Confucius

Knowing is not enough, we must apply.
Willing is not enough, we must do.
Bruce Lee

What shapes our lives are the questions we ask, refuse to ask, or never think to ask.
Sam Keen

If you can't describe what you're doing as a process, you don't know what you're doing.
E. Edwards Deming

Life is either a daring adventure or nothing. Security does not exist in nature, nor do the children of men as a whole experience it. Avoiding danger is no safer in the long run than exposure.
Helen Keller

If I have seen farther than others, it is because I was standing on the shoulders of giants.
Isaac Newton
Here's the corollary:
If I have not seen as far as others, it is because giants were standing on my shoulders.
Hal Abelson

Nothing will ever be attempted if all possible objections must first be removed.
Samuel Johnson

There is nothing so annoying as to have two people talking when you're busy interrupting."
Mark Twain (Samuel Clemens)

The consequences of a claim that something is true are entirely irrelevant to the issue of whether the claim is true.
Steven Goldberg

Truth is incontrovertible.
Panic may resist it,
Ignorance may deride it,
malice may distort it,
but there it is...
Sir Winston Churchill

We make a living by what we get. We make a life by what we give.
Sir Winston Churchill

History will be kind to me
for I intend to write it.
Sir Winston Churchill

A lie gets halfway around the world before the truth has a chance to get its pants on.
Sir Winston Churchill

Success is the ability to go from one failure to another with no loss of enthusiasm! (I do this all the time!)
Sir Winston Churchill

It's an impossible situation,
but it has possibilities.
Sam Goldwyn

You must believe in free will; there is no choice.
Isaac Bashevis Singer

The heights by great men reached and kept,
Were not attained by sudden flight,
But they, while their companions slept,
Were toiling upward in the night.
Henry Wadsworth Longfellow

In theory, there is no difference between theory and practice. But, in practice, there is.
Jan L.A. van de Snepscheut

People don't do what they believe in - they just do what's most convenient and then repent.
Bob Dylan

Never interrupt your enemy when he is making a mistake.
Napoleon Bonaparte (1769-1821)

Don't be so humble - you are not that great.
Golda Meir (1898-1978) to a visiting diplomat

Unless you try to do something beyond
what you have already mastered,
you will never grow.
Ronald E. Osborn

Nothing comes from doing nothing.
Shakespeare

My opinions may have changed,
but not the fact that I’m right.
Ashleigh Brilliant

Unwritten Law: Most people do almost enough to win.
A.L.Williams

The Majority Is Always Wrong
Earl Nightingale

If you're willing to do for a year what others won't, you can do for a lifetime what others CAN'T! 
(Unknown)

When one door closes, another opens.
Helen Keller

There are MORE than two sides to every coin.
The closer you look, the more sides you'll find.
Robert Binnion (-yours truly)

I am bigger than anything that can happen to me.
All these things, sorrow, misfortune, and suffering,
are outside my door.
I am in the house, and I have the key.
Charles F. Lummis (1859 - 1928)

Better ask ten times than go astray once.
Unknown

He who has to ask questions looks like a fool for a minute; he who does not ask questions remains a fool forever.
from The Shanghai Union of Industrial Mystics by Nury Vittachi

You can go no further than halfway into a dark forest: from then on you are coming out of the other side.
from The Shanghai Union of Industrial Mystics by Nury Vittachi

If everyone is thinking alike then somebody isn't thinking.
George Patton

When people go to work they shouldn't have to leave their hearts at home.
Betty Bender

Don't worry about people stealing your ideas.
If your ideas are any good, you'll have to ram them down people's throats..
Howard Aiken

Be kind -
Everyone you meet
is fighting a hard battle.
John Watson

Every flower must grow through dirt.
Unknown

In the hour of adversity
be not without hope
For crystal rain falls
from black clouds.
Nizami

Get off your horse and drink your milk.
John Wayne

Tomorrow is the most important thing in life. Comes into us at midnight very clean. It's perfect when it arrives and it puts itself in our hands. It hopes we've learned something from yesterday.
John Wayne

Do just once what others say you can't do, and you will never pay attention to their limitations again.
James R. Cook

When we fall in love what attracts us most about other people is how different they are from us. Once hitched we tend to change ourselves to accomodate what we think our partner wants of us. So, what starts out as an exciting relationship full of spontaneity and contrast becomes a life of strict rules, making everything seem the same. We wind up dancing to each other's tune.
Stuart Wilde

Do not stand in a place of danger trusting in miracles.
Arabic Proverb

Whatever happens in life, if it doesn't kill you
it can only make you stronger.
Johann Wolfgang von Goethe

But Godliness with contentment is great gain.
1 Timothy 6:6

He who is satisfied, is rich.
Lao Tzu

When dealing with people, remember you are not
dealing with creatures of logic, but creatures of emotion.
Dale Carnegie

The heart has it's reasons
that reason does not know.
Blaise Pascal

To achieve great things, two things are needed: a plan, and not quite enough time.
Leonard Bernstein
 

For every action, there is an equal and opposite criticism!
Unknown

Each experience in your life was absolutely necessary in order to have gotten you to the next place, and then the next, up until this very moment.
Dr. Wayne Dyer

One win can make up for years of failure.
Unknown