zeal

s. celo, acicate, afán, ahínco, ardor, empeño, entusiasmo, fervor, unción

celo, entusiasmo

Ex: One is to believe, for instance, that the public library movement began in a passion of liberal and humanitarian zeal, and yet public libraries were generally cold, rigidly inflexible, and elitist institutions from the beginning.

(n.) = fervor, entusiasmo
Ex: One is to believe, for instance, that the public library movement began in a passion of liberal and humanitarian zeal, and yet public libraries were generally cold, rigidly inflexible, and elitist institutions from the beginning.