The universe is a vast and mysterious place, and we are only beginning to understand its complexities.
有两样东西,人们越是经常持久地对之凝神思索,它们就越是使内心充满常新而日增的惊奇和敬畏:我头上的星空和我心中的道德律。
有了实际工作的经验,幼儿的自我就会逐渐发展强化。