Memory is not fixed; it’s a skill you can train.
革命道德不是从天上掉下来的。它是在日常斗争中培养,在革命活动中锤炼的。
A scientist in his laboratory is not a mere technician: he is also a child confronting natural phenomena that impress him as though they were fairy tales.
解释:天道远离人间,人道则存在于身边的社会人事之中,可以就近掌握。对于人所难及的事物,如何能知道呢?