释义：如果计划不够周密和保密，灾祸就会先到来。

The laws that forbid the carrying of arms are laws of such a nature. They disarm only those who are neither inclined nor determined to commit crimes.... Such laws make things worse for the assaulted and better for the assailants; they serve rather to encourage than to prevent homicides, for an unarmed man may be attacked with greater confidence than an armed man.

确保和平的唯一方式是为战争做好准备。

物理学的美丽在于它能够用简单的原理解释宇宙的复杂性。