The idea was expanded in an essay on forcefulness of character.
"Command"
William McFee
Because of a straight-eyed sincerity and a candid vigour which endowed him with a forcefulness beyond his years, and because a certain deliberate humour played in his eyes and flashed occasionally into his ungarrulous speech, he found himself smiled upon with the tolerant approval of the older ladies and the point-blank delight of the younger.
"The Tempering"
Charles Neville Buck
He glanced inquiry at Doolittle, who was a shorter and stouter man, with a knack of getting over obstacles by sheer forcefulness.
"Hilda Wade A Woman With Tenacity Of Purpose"
Grant Allen