Too often we enjoy the comfort of opinion without the discomfort of thought. (John F. Kennedy)

Public opinion, though often formed upon a wrong basis, yet generally has a strong underlying sense of justice. (Abraham Lincoln)

People with opinions just go around bothering each other.(Buddha)

To refuse a hearing to an opinion, because they are sure that it is false, is to assume that their certainty is the same thing as absolute certainty. All silencing of discussion is an assumption of infallibility. Its condemnation may be allowed to rest on this common argument, not the worse for being common.
(John Stuart Mill)

Luck is what happens when preparation meets opportunity. (Seneca)

I will prepare and some day my chance will come. ( Abraham Lincoln )

Most plain girls are virtuous because of the scarcity of opportunity to be otherwise. ( Maya Angelou)

The Gods cannot help those who do not seize opportunities. (chinese proverb)

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 has opened for us. ( Alexander Graham Bell )

Nature creates ability; luck provides it with opportunity. ( François de la Rochefoucauld)

I was seldom able to see an opportunity until it had ceased to be one. (Mark Twain)

Opportunities fly by while we sit regretting the chances we have lost, and the happiness that comes to us we heed not, because of the happiness that is gone. (Jerome K. Jerome)

Americans… still believe in an America where anything’s possible – they just don’t think their leaders do. (Barack Obama)

My first job is to say thank you to those who voted me. Those who didn’t, I’m going to get your vote next time. (Barack Obama)

I don’t oppose all wars. What I am opposed to is a dumb war. What I am opposed to is a rash war. (Barack Obama)

i’ve got two daughters. 9 years old and 6 years old. I am going to teach them first of all about values and morals. But if they make a mistake, I don’t want them punished with a baby. (Barack Obama)

Money is not the only answer, but it makes a difference. (Barack Obama)

We have an obligation and a responsibility to be investing in our students and our schools. We must make sure that people who have the grades, the desire and the will, but not the money, can still get the best education possible. (Barack Obama)

Three months is a lifetime in politics (Barack Obama)

I did. It’s not something that I’m proud of. It was a mistake as a young man, but you know? I mean not going to — I never understood that line. The point was to inhale. That was the point. (Barack Obama)

We have real enemies in the world. These enemies must be found. They must be pursued and they must be defeated. (Barack Obama)