不臨於深泉,何以知沒溺之患?
How can one know the danger of drowning in the depths without drawing near to a watery abyss?
不觀於海上,何以知風波之患?
How can one know the danger of the wind and waves without gazing on the ocean’s face?
失之者其不在此乎?
士慎三者,無累於人。」
If a gentleman uses care in facing these three circumstances, he need not entangle others in his difficulties.