The most sustainable leather is the one that lasts the longest, reducing the need for frequent replacements.

I have a very simple idea on how to get rich. The first is to spend less than you make, and the second is to invest the difference wisely.

The only obsession everyone wants: 'love.'

信じることは、時に苦しい。でも、信じることをやめたら、何も始まらない。

The only way to learn mathematics is to do mathematics.