It is absolutely certain that we must act to protect nature much more efficiently than ever before. Tomorrow – when mankind will step forward to a totally uncertain future – will be too late.

Understanding how little we know is crucial to gaining knowledge.

The older the friendship, the stronger the trust.

Superficial people consider themselves capable of doing everything. The question, however, is who is willing to hire them?

There will come a time when people will realize the greatest mysteries of the universe: will a human then meet anything other than himself?

In the frame of a known phenomenon of life, a human could be defined as the only proven thinking creature.

Do not look for company at all costs, and especially do not allow loneliness to lead you to fickle love or false friendship.

Acquiring knowledge through the centuries has influenced human society more than all other factors.

The development of civilization was marked by constant changes. This will continue – therefore, the future will belong to people ready for change.

Only a person who is motivated in the inner depths of his being will help without hesitation and with no obligation for the one helped.

Be patient in life, knowing that there is a real possibility that the desired outcome could happen without your direct involvement.

How did they go from Braveheart to Brigadoon in less than five minutes?

I work as my father drank.

We, the women of the Senate, with President Obama by our side, will keep fighting - our shoulders square, our lipstick on - because you deserve equal pay for your hard work.

I have never known a man who was sensual in his youth, who was high-minded when old.

If you'll promise not to cry, Baby, I will kiss you by-and-by—Maybe! Though you're six feet three, You will always be Nothing but a Baby, dear, to me.

We should no more tolerate false doctrine that we would tolerate sin.

You've got to appreciate what the worst is. You don't want to find yourself in a situation where you're facing it.

About specific social issues, there is a great deal to say that departs very far from truism and is, accordingly, significant and controversial.

Excellently observed", answered Candide; "but let us cultivate our garden.

I still consider myself a very spiritual person but the structure of the church isn't really for me.