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 beauty of physics lies not just in the answers it provides, but in the mysteries it reveals.
The mathematician's patterns, like the painter's or the poet's, must be beautiful; the ideas, like the colors or the words, must fit together in a harmonious way.
要找到自己，就要为自己思考。
战争是危险的领域，因此勇气是战士的首要品质。
Leadership means making tough decisions today that will ease tomorrow's challenges.
"Traveling – it leaves you speechless, then turns you into a storyteller."