Do not count your chickens before they are hatched.
埃塞俄比亚人
The Aethiop
有人买下一个黑人奴隶（埃塞俄比亚人），他认为，奴隶的皮肤之所以这么黑是因为他原先主人的疏忽。因此，他刚把奴隶带回家，就立即为他冲洗。用尽了各种方法，可是黑人的肤色没有丝毫改变。反而，由于清洗的次数太多，奴隶很快就患上了重感冒。
天生的东西是没办法改变的。
The purchaser of a black servant was persuaded that the color of his skin arose from dirt contracted through the neglect of his former masters. On bringing him home he resorted to every means of cleaning，and subjected the man to incessant scrubbings. The servant caught a severe cold，but he never changed his color or complexion.
