Themes
Who has no children does not know what life is.
— Proverb

Behind the line May contain spoilers.
Our reading
An editorial interpretation.
This proverb says that raising kids teaches you something about life that nothing else can. It's a claim about experience: without children, the speaker suggests, you're missing a whole layer of understanding. It's a sweeping and rather absolute view, and it's presented as folk wisdom rather than as fact.
Context reviewed