每张皮革都承载着两个历史：动物的生命和制革者的遗产。我们对两者都负有责任。

Don't sleep during the day at night, more or less what escape hide it. The day cannot solve the knot, the night slowly consumes.

There are no permanent trends, only permanent users.

过去从未死去，它甚至还未过去。

Don't get involved in partial problems, but always take flight to where there is a free view over the whole single great problem, even if this view is still not a clear one.

"To read is to travel without moving, to live a thousand lives in one."

唯一不变的是变化，持续的变化，不可避免的变化，这是当今社会的主导因素。任何明智的决策都必须考虑到世界现在的样子，以及世界未来的样子。

The best mathematics is timeless.

中庸：不走极端。对别人的伤害保持隐忍，将此视为应得之事。