The only limits that exist are the ones you place on yourself.
Man's main task in life is to give birth to himself, to become what he potentially is. The most important product of his effort is his own personality.
科学家研究自然并非因为它有用;他研究它是因为他从中获得乐趣,而他从中获得乐趣是因为它是美丽的。
The future of energy is not either/or—it's all of the above.