Mathematics is not a spectator sport.

The key to successful investing is to have a clear understanding of the market, the risks involved, a disciplined approach, a long-term perspective, and a strong understanding of the fundamentals.

重要的不是你对了还是错了，而是当你对了的时候你赚了多少钱，当你错了的时候你亏了多少钱。

人は、自分が救われるために、他人を救う。

The important thing in life is not the triumph but the struggle.