句子使用'not...until...'结构强调时间条件，后半句'thereby understanding'作结果状语，逻辑清晰但略长。
One does not know the hardship of motherhood until raising children oneself, thereby understanding the gratitude owed to her.
In a mother's tears lies a love so noble and profound that it defies chemical analysis.
Do not forget how your mother raised you; look only at how you raise your own children today.
One who does not manage a household does not know the cost of rice and firewood; one who does not raise children does not understand the debt of gratitude to their mother.
In times of poverty, one identifies the filial son; in times of national chaos, one recognizes the loyal minister. — "Collection of Famous Sages"
Charity should extend to one's closest relatives, but should not stop there. — Samuel Johnson
Physical injury brings worry to parents; moral injury brings shame to them. — Li Yuxiu, "Standards for Students"
The green mountains weep with sorrow, calling for their stern fathers; the clear waters lament in blood, crying for their loving mothers. — "Collection of Couplets"
Value emotions over material things; care for the living generously and bury the dead simply. — Zeng Guofan
There is affection between father and son, righteousness between ruler and minister, distinction between husband and wife, order between elder and younger, and trust between friends. — Mencius
Mencius said: Loving one's parents is benevolence; respecting one's elders is righteousness. To cherish one's parents is to practice benevolence; to honor one's elders is to practice righteousness. — "Mencius, Part 1, Chapter 9"
Loving those whom one's parents love and respecting those whom they respect. — Confucius
Parents are the root of humanity. — Sima Qian
Great filial piety involves admiring one's parents for life. Only by being filial to one's parents can one find peace of mind. — Mencius
Parents only worry about their children's illnesses.
从小不知老娘亲，育儿才知报娘恩。
慈母泪，有化学分析不了的高贵而深沉的爱存在其中。
不记当初娘养我，但看今朝自养儿。
不当家，不知柴米贵；不养儿，不知报母恩。
家贫知孝子，国乱识忠臣。《名贤集》
慈善行及至亲，但不应为止。富勒
身有伤，贻亲忧；德有伤，贻亲羞。李毓秀《弟子规》
青山悲吟声声泪，声声呼严父；碧水苦诉字字血，字字哭慈母。《对联集锦》
重情轻物，厚养薄葬。字严
父子有亲，君臣有义，夫妇有别，长幼有叙，朋友有信。孟子
孟子曰：亲亲，仁也；敬长，义也。孟子说：亲爱父母亲，便是仁；尊敬兄长便是义。《孟子·尽心上》
父母之所爱亦爱之，父母之所敬亦敬之。孔子
父母者，人之本也。司马迁
大孝终身慕父母。唯孝顺父母可以解忧。孟轲
父母惟其疾之忧。