Quotation from: White Fang

Written by: Jack London

But White Fang was not demonstrative. He was too old, too firmly
moulded, to become adept at expressing himself in new ways. He was too
self-possessed, too strongly poised in his own isolation. Too long had
he cultivated reticence, aloofness, and moroseness. He had never barked
in his life, and he could not now learn to bark a welcome when his god
approached. He was never in the way, never extravagant nor foolish in
the expression of his love. He never ran to meet his god. He waited at
a distance; but he always waited, was always there. His love partook of
the nature of worship, dumb, inarticulate, a silent adoration. Only by
the steady regard of his eyes did he express his love, and by the
unceasing following with his eyes of his god's every movement. Also, at
times, when his god looked at him and spoke to him, he betrayed an
awkward self-consciousness, caused by the struggle of his love to express
itself and his physical inability to express it.