Your son is your son today, but your daughter is your daughter forever.
Note: A familiar English language equivalent might be: “Your son is your son until he takes a wife, but your daughter is your daughter for the rest of her life.”
A friend is known in hardship.
Note: Unlike a “fair weather friend” (who is no real friend at all), a true friend is one who stands by you in hard times.
Note also: If the verb tense here strikes you as being unfamiliar, it is the ever popular independent form of the present habitual.
The people encounter one another, but the hills never meet (nor the mountains).
Note: This is a bit ironic. The hills have all of the time in the world and spend their entire existence in sight of one another, but never get to consort with their own kind. Although we mere mortals may have our days numbered, we can pass them in the warmth of one another’s company.