人类有一件真正有力的武器，那就是笑。
The human race has one really effective weapon, and that is laughter.
The concept of legal authority is essential for the functioning of a legal system.
Mathematics is the key and door to the sciences.
The best things in life are free.
生命的复杂性不是理解的障碍，而是通向更深层次洞察的门户。
"A leitura é uma viagem sem fim, onde cada página é uma nova descoberta."
我认为在生活中保持平衡很重要，不要让工作消耗你。
You can't just sit there and wait for people to give you that golden dream. You've got to get out there and make it happen for yourself.
The only limit to our realization of tomorrow will be our doubts of today.