Usar "concenter" en una oración

1. and handle those parts which attract and concenter the warmest force of

2. But when, by certain motions, certain unquietness of his hands, that wandered not without design, I found he languished for satisfying a curiosity, natural enough, to view and handle those parts which attract and concenter the warmest force of imagination, charmed, as I was, to have any occasion of obliging and humouring his young desires, I suffered him to proceed as he pleased, without check or control, to the satisfaction of them