“A young man before he leaves the shelter of his father's house, and the guard of a tutor, should be fortify'd with resolution, and made acquainted with men, to secure his virtues, lest he should be led into some ruinous course, or fatal precipice, before he is sufficiently acquainted with the dangers of conversation, and his steadiness enough not to yield to every temptation.”
Sec. 70
Some Thoughts Concerning Education (1693)
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John Locke 144
English philosopher and physician 1632–1704Related quotes

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Context: Before you can be an internationalist you have first to be a naturalist and feel the ground under you making a whole circle. It is easier for a man to be loyal to his club than to his planet; the bylaws are shorter, and he is personally acquainted with the other members. A club, moreover, or a nation, has a most attractive offer to make: it offers the right to be exclusive. There are not many of us who are physically constituted to resist this strange delight, this nourishing privilege. It is at the bottom of all fraternities, societies, orders. It is at the bottom of most trouble. The planet holds out no such inducement. The planet is everybody's. All it offers is the grass, the sky, the water, the ineluctable dream of peace and fruition.

“A man should know something of his own country too, before he goes abroad.”
Book VII (1765), Ch. 2.
The Life and Opinions of Tristram Shandy, Gentleman (1760-1767)
Source: The Bourgeois: Catholicism vs. Capitalism in Eighteenth-Century France (1927), p. 89