A problem is a chance for you to do your best.
— Duke Ellington
...there is only one genuine misfortune: not to be born.
— Joaquim Maria Machado de Assis
No great man ever complains of want of opportunity.
— Ralph Waldo Emerson
Problems are only opportunities in work clothes.
— Henry J. Kaiser
When one door of happiness closes, another opens; but often we look so long at the closed door that we do not see the one which has been opened for us.
— Helen Keller
I was seldom able to see an opportunity until it had ceased to be one.
— Mark Twain
Next to knowing when to seize an opportunity, the most important thing in life is to know when to forgo an advantage.
— Benjamin Disraeli
It is not impossibilities which fill us with the deepest despair, but possibilities which we have failed to realize.
— Robert Mallet
Time is that wherein there is opportunity, and opportunity is that wherein there is no great time.
— Hippocrates
A man hath no better thing under the sun, than to eat, and to drink, and to be merry.
— Ecclesiastes 8:15
...where legitimate opportunities are closed, illegitimate opportunities are seized. Whatever opens opportunity and hope will help to prevent crime and foster responsibility.
— Lyndon B. Johnson
Bad times have a scientific value...We learn geology the morning after the earthquake.
— Ralph Waldo Emerson