The only limits that exist are the ones in your mind.
杰出的领导者会不遗余力地提升员工的自尊。如果人们相信自己,他们能取得的成就是惊人的。
Mathematics is not a spectator sport. You have to do it to understand it.
儿童的进步不是取决于年龄,而是取决于能够自由地观看他周围的一切。