Only those who will risk going too far can possibly find out how far one can go.

The positive thinker see the invisible, feels the intangible, and achieve the impossible.

There will be obstacles. There will be doubters. There will be mistakes. But with hard work, there are no limits.

The day will soon come when I will show the world that the transmission of power and speech without the aid of any wires is possible.

So many of our dreams at first seem impossible. Then they seem improbable. And then, when we summon the will, they soon become inevitable.

Free will, though it makes evil possible, is also the only thing that makes possible any love or good or joy worth having.

Man can learn nothing unless he proceeds from the known to the unknown.

There are risks and costs to a program of action. But they are far less than the long range risks and costs of comfortable inaction.

I dream, I test my dreams against my beliefs, I dare to take risks, and I execute my vision to make those dreams come true.

The best people possess a feeling for beauty, the courage to take risks, the discipline to tell the truth, the capacity for sacrifice. Ironically, their virtues make them vulnerable; they are often wounded, sometimes destroyed.

Be brave. Take risks. Nothing can substitute experience.

The use of traveling is to regulate imagination by reality, and instead of thinking how things may be, to see them as they are.

If you want to succeed you should strike out on new paths, rather than travel the worn paths of accepted success.

As the traveler who has once been from home is wiser than he who has never left his own doorstep, so a knowledge of one other culture should sharpen our ability to scrutinize more steadily, to appreciate more lovingly, our own.