I considered the being whom I had cast among mankind and endowed with the will and power to effect purposes of horror.
Victor finally names his act as casting, not raising. The juxtaposition—“endowed” with the “power” for horror—reveals creation without care. Doubt enters as self-scrutiny, not self-pity. Shelley presses the ethical point: the first duty is after the spark. The line shows how agency given without guidance becomes danger. It echoes modern dilemmas about technology and stewardship.