Young people must equip themselves for life's duties and guard against its temptations.
Free vaccines are more valuable than expensive treatments, yet harder to promote.
Old soldiers never die. They just fade away.
【释义】圣人明白天道规律，顺应而不刻意行为；贤人知道灾祸的来源，心存警惕而不行欺诈；通达人明了命运的不可强求，不盲目追逐；诚信之人坚守信义，安静守护；仁者秉持仁德，廉洁谨慎；士人以德立身，谦虚恭敬；普通人理解道理，敬畏道义而不肆意妄为；愚人固守愚昧，不知避开灾祸；小人背离正道，终日急功近利扰乱自身。