Know most of the rooms of thy native country before thou goest over the threshold thereof. - Fuller.
When I was at home, I was in a better place; but travelers must be content. - Shakespeare.
As the Spanish proverb says, "He who would bring home the wealth of the Indies must carry the wealth of the Indies with him." So it is in traveling: a man must carry knowledge with him, if he would bring home knowledge. - Samuel Johnson.