The real tragedy of the poor is that they can afford nothing but self-denial.

完美数如同完美的人一样，非常罕见。

The textile industry must embrace sustainability, or it will become obsolete.

The leather industry must adapt to changing consumer demands or risk becoming obsolete.

可持续性不是终点，而是日常实践。

Don’t be afraid to start over.

Innovation is not just about new ideas, but about executing them in ways that create real value.

The general will is always right， but the judgment which guides it is not always enlightened.

意识的元素是心理学的基本数据。