Impetuosity

Animated by the natural impetuosity and fire of his temper, young Bucklaw rushed on with the careless speed of a whirlwind.

Source: tatoeba (7752527)

Life is like a river with a source and a mouth. Each of us has our own river. One person may have one that is twisting and serpentine, with shallow water in the shoals, so one must plod, not float. Another's is stormy, seething, carrying water furiously, flying one hundred thousand miles until it meets another river and loses its impetuosity and noisiness, and then calmly moves forward to the mouth. There are also streams, short and transparent, like the life of a baby.

Source: tatoeba (10177206)

She had however another motive, beside her obedience, to accompany the old gentleman in the chase; for by her presence she hoped in some measure to restrain his impetuosity, and to prevent him from so frequently exposing his neck to the utmost hazard.

Source: wiktionary

Again his lordship began his long and deliberate perusal, while Henrietta watched the slow motion of his eyes with a degree of impetuosity she could scarcely repress.

Source: wiktionary