Jonas Salk

The reward of a thing well done is to have done it.

The question is not whether we can afford to do it, but whether we can afford not to do it.

The greatest discovery is to find the question.

I am a scientist. I am a physician. I am a humanist. I am a father. I am a husband. I am a citizen. I am a human being. I am a man of science, and I am a man of faith.

The future of humanity depends on our ability to cooperate and to create a sustainable world.

The greatest challenge of the 21st century is to create a sustainable civilization.

The greatest good we can do for others is not just to share our riches, but to reveal to them their own.

The greatest discovery is to find the question, not the answer.

The most important thing is to keep asking questions.

The greatest challenge is to transform knowledge into wisdom.

The greatest challenge is to create a world where all people can live in peace and dignity.

The greatest challenge is to create a world where all people can live in harmony with nature.

The greatest challenge is to create a world where all people can live in health and well-being.

The greatest challenge is to create a world where all people can live in freedom and justice.

The greatest challenge is to create a world where all people can live in love and compassion.

The greatest challenge is to create a world where all people can live in joy and happiness.

The greatest challenge is to create a world where all people can live in peace and prosperity.

The greatest challenge is to create a world where all people can live in dignity and respect.

The greatest challenge is to create a world where all people can live in understanding and tolerance.

The greatest challenge is to create a world where all people can live in harmony and balance.