Perennial

The oligarchic character of the modern English commonwealth does not rest, like many oligarchies, on the cruelty of the rich to the poor. It does not even rest on the kindness of the rich to the poor. It rests on the perennial and unfailing kindness of the poor to the rich.

Source: tatoeba (410290)

Neither be cynical about love; for in the face of all aridity and disenchantment it is as perennial as the grass.

Source: tatoeba (1490947)

Be yourself. Especially, do not feign affection. Neither be cynical about love; for in the face of all aridity and disenchantment it is perennial as the grass.

Source: tatoeba (6711347)

What object is served by this circle of misery and violence and fear? It must tend to some end, or else our universe is ruled by chance, which is unthinkable. But what end? There is the great standing perennial problem to which human reason is as far from an answer as ever.

Source: tatoeba (6958010)