To write is to descend into the abyss of oneself.

信贷市场的歧视让穷人支付更高的利息。

Persistence is key in mathematical research; many great results come from long struggles.

【大意】人的贪欲多了，就会亏损道义；忧虑多了，就会损害智慧；畏惧多了，就会伤害勇气。