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FORE:To urge the necessity of learning practical fitting as a part of an engineering education is superfluous. A mechanical engineer who has not been "through the shop" can never expect to attain success, nor command the respect even of the most inferior workmen; without a power of influencing and controlling others, he is neither fitted to direct construction, nor to manage details of any kind connected with engineering industry. There is nothing that more provokes a feeling of resentment in the mind of a skilled man than to meet with those who have attempted to qualify themselves in the theoretical and commercial details of engineering work, and then assume to direct labour which they do not understand; nor is a skilled man long in detecting an engineer of this class; a dozen words in conversation upon any mechanical subject is generally enough to furnish a clue to the amount of practical knowledge possessed by the speaker.Epicurus was assuredly not a master of language, but had he meant all that is here put into his mouth, he would hardly have been at a loss for words to say it. Remembering that the Κ?ριαι δ?ξαι constituted a sort of creed drawn up by the master himself for his disciples to learn by heart,144 and that the incriminated passage is one of the articles in that creed, we need only look at the context to make certain that it has been entirely misread by his apologist.145 In the three preceding articles, we are told that justice is by nature a contract for the prevention of aggressions, that it does not exist among animals which are unable, nor among tribes of men which are either unable or unwilling to enter into such an agreement, and��with reiterated emphasis��that, apart from contracts, it has no original existence (o?κ ?ν τ? καθ�� ?αυτ? δικαιοσ?νη). There is nothing at all about a true as distinguished from a false justice; there is no allusion whatever to the theories of any ��contemporaries of Socrates;�� the polemic reference, if any, is to Plato, and to Plato alone. Then comes the declaration quoted above, to the effect that injustice is not an evil in itself, but only an evil through the dread of punishment which it produces. Now, by injustice, Epicurus must simply mean the opposite of what he defined justice to be in the preceding paragraph��that is, a breach of the agreement not to hurt one another (μ? βλ?πτειν ?λλ?λου?). The authority of the State is evidently conceived, not as superseding, but as enforcing agreements. The succeeding article still further confirms the view rejected by Mr. Wallace. Epicurus tells us that no man who stealthily evades the contract to abstain from mutual aggressions can be sure of escaping detection. This is72 evidently added to show that, apart from any mystical sanctions, fear of punishment is quite enough to deter a prudent man from committing crimes. And we can see that no other deterrent was recognised by Lucretius, when, in evident reference to his master��s words, he mentions the fears of those who offend��not against mere conventional rules, but against human rights in general��as the great safeguard of justice.146 Donec sit amet ligula enim. Duis vel condimentum massa. Maecenas eget congue dui. Vestibulum et eros consectetur, interdum nibh et, volutpat dolor.