Gratitude

Haec enim est una virtus non solum maxima sed etiam mater virtutum.

[Gratitude] is not only the greatest, but is also the parent of all the other virtues.

Marcus Tullius Cicero – Roman politician (106-43 B.C.), from his oratio “Pro Cn. Plancio” (54 B. C.), Quotations book 2020