教我恋爱？先教教你自己，恋爱艺术属我第一，恋爱之神，如果有这么种东西，也得先向我学习。

The first duty of the sovereign， that of protecting the society from the violence and invasion of other independent societies， can be performed only by means of a military force.

The poet’s task is to make the invisible visible.

The success of an enterprise cannot be achieved without a deep understanding of the market and respect for consumers.