In dark days, your best shelter is your clever thoughts!

Instead of decaying in a safe harbour, sail to the unsafe oceans!

There are two kinds of science: The black science and the white science. The science of weapon production is the black one. Working in this category of science is a great betrayal to humanity!

The more independent mind you have the more your government will hate you! It is an honour for you to be hated this way!

Those who found nothing on the plains will find nothing on the summits of mountains!

In every defeat, there develops a silent embryo of victory; in every failure, under the rubbles, there appears a divine key to success.

Let us freely walk in the countryside, like a horse peacefully walking towards sunset without any particular purpose!