“Efforts and courage are not enough without purpose and direction.”

Persons are judged to be great because of the positive qualities they possess, not because of the absence of faults.

Here on earth, God’s work must surely be our own.

The greater our knowledge increases the more our ignorance unfolds.

As we express our gratitude, we must never forget that the highest appreciation is not to utter words, but to live by them.

To those whom much is given, much is expected.

There can be no progress if people have no faith in tomorrow.

Hold fast to the best of the past and move fast to the best of the future.

We must find time to stop and thank the people who make a difference in our lives.

We are not here to curse the darkness, but to light the candle that can guide us through that darkness to a safe and sane future.

Anyone who can solve the problems of water will be worthy of two Nobel prizes – one for peace and one for science.

If not us, who? If not now, when?

We must use time as a tool, not as a couch.

Sometimes party loyalty asks too much.

The rising tide lifts all the boats.

The world is very different now. For man holds in his mortal hands the power to abolish all forms of human poverty, and all forms of human life.

So long as freedom from hunger is only half achieved, so long as two thirds of the nations have food deficits, no citizen, no nation can afford to be satisfied.

It is a tremendous responsibility for us to have all the eyes focused on what we do and give people exactly what they need when they ask for it.

The whole secret lies in confusing the enemy, so that he cannot fathom our real intent.

I have been in relatively high-risk businesses all of my adult life.

The best way of learning about anything is by doing.

I am 67, but I’m not too old to make a fresh start.

If we want to have the biggest impact, the best way to do this is to make sure we always focus on solving the most important problems.

Entrepreneurs must be willing to be misunderstood for long periods of time.

We’re not going to be the first to this party, but we’re going to be the best.