Efficiency is highly overrated； Goofing off is highly underrated. Regularly scheduled sabbaths， sabbaticals， vacations， breaks， aimless walks and time off are essential for top performance of any kind. The best work ethic requires a good rest ethic.

义理（思想内容）、考据（文献考证）、辞章（文辞表达）三者缺一不可。

可持续农业需要在技术和生态保护之间取得平衡。