The greatest truths are often the ones we cannot put into words.

The highest and most beautiful things in life are not to be heard about, nor read about, nor seen but, if one will, are to be lived.

The end of history will be a very sad time. The struggle for recognition, the willingness to risk one's life for a purely abstract goal, the worldwide ideological struggle that called forth daring, courage, imagination, and idealism, will be replaced by economic calculation, the endless solving of technical problems, environmental concerns, and the satisfaction of sophisticated consumer demands.

学习应使人感到快乐，否则不能称之为真正的学习。

The universe is not outside of you. Look inside yourself; everything that you want, you already are.