解释：自己行为不端的人就难以要求别人行为端正，不孝顺父母的人也不能忠于君主。

The light constantly changes, and that alters the atmosphere and beauty of things every minute.

Resilience in business comes from diversifying both energy sources and strategies.

The pursuit of mathematical knowledge is a never-ending adventure.

"Biography is the most intimate form of history."