Emily Thomas - The Meaning of Travel: Philosophers Abroad

No young person under forty is ever to be allowed to travel abroad under any circumstances; nor is anyone to be allowed to go for private reasons, but only on some public business, as a herald or ambassador or as an observer of one sort or another.

Plato, Republic(c.380 BCE )

In manners or behaviour, your Lordship must not be caught with novelty, which is pleasing to young men; nor infected with custom, which makes us keep our own ill graces, and participate of those we see every day; nor given to affectation (a general fault of most of our English travellers), which is both displeasing and ridiculous.

Francis Bacon, Essays(1597)

Have you considered all the dangers of so great an enterprise, the costs, the difficulty, the expectation, the conclusion, and everything else pertinent, and weighed them properly in your judgement? There is heaven, you say, but perhaps you can scarcely see it through the continuous darkness. There is earth, which you wont dare to tread upon perhaps, because of the multitude of beasts and serpents. There are men, but you would prefer to do without their company. What if some Patagonian Polyphemus [Cyclops] were to tear you to pieces and then straightaway devour the throbbing and still-living parts?

Joseph Hall, Another World and Yet the Same(1605)

It may be doubted whether all persons mayundertake Travel Infants and decrepit personsfooles, madde men and furious persons whose disabilities of mind are such as no hope can be expected for the one or other. Lastly, the Sex in most Countries prohibiteth women, who are rather for the house than the field.

Thomas the Travailer Palmer, An Essay of the Means how to make our Trauailes, into forraine Countries, the more profitable and honourable(1606)

It were of use to inform himself (before he undertakes his Voyage,) by the best Chorographical and Geographical Map of the Situation of the country he goes to, both in it self and Relatively to the Universe.

Edward Leigh, Three Diatribes(1671)