References in classic literature ?
Then it rushed in upon his consciousness that he really loved her for what she was, for all the boy in her and all the rest of her--for the total of her that would have been a different total in direct proportion to any differing of the parts of her.
Considered as a reflector, it is potent in producing a monstrous and odious uniformity: and the evil is here aggravated, not in merely direct proportion with the augmentation of its sources, but in a ratio constantly increasing.
Little Go-bu-balu gave evidences of a greater interest in life, an interest which varied in direct proportion to the distance he was from the apes of Kerchak.
In direct proportion to the white man's stupidity is his success in farming the world--"