数战则民劳,久师则兵敝。
译文:连续地打仗,百姓就会感到劳苦;长期打仗,士兵就会感到疲惫。
It’s on the strength of observation and reflection that one finds a way. So we must dig and delve unceasingly.
Agricultural technology is not lofty theory, but must be truly implemented in the fields.