My life I never held but as a pawn to wage against your enemies.

热闹的场合可以锻炼心境，安静可以养心，坐时可以守心，行动时可以考验心灵，言时省心，动时制心。

儿童擅长在自由活动中建立规律。

创造建筑就是创造一个世界。

"The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

电流体不是由机器创造的，而是由它收集的。