In this workshop, children are invited to make educational and useful toys - Â‘usefulÂ’ in the sense that they help with a childÂ’s early development, providing stimulation, exercise, use of the senses, and learning of skills.
Let a child be employed -- take an interest in his employment, let him fancy that he is useful -- _and he is useful_, he is laying in a stock of health.
Exactly the same difficulty arises, when we endeavour to account for the development of the moral sense or conscience in savage man; for although the _practice_ of benevolence, honesty, or truth, may have been useful to the tribe possessing these virtues, that does not at all account for the peculiar _sanctity_, attached to actions which each tribe considers right and moral, as contrasted with the very different feelings with which they regard what is merely _useful_.
Carnotâ€™s experiments also showed that thermodynamic laws are essentially economic formulations of physical relations, for the terms â€™usefulâ€™ and â€™unavailableâ€™ energy refer to the economyâ€™s ability to use energy to upgrade the organizational state of natural resources into useful goods and services.
The word useful came out with a spiteful, bitter twist.