One thing that you may try is to bring in the opinions of well respected individuals.
“Travel is fatal to prejudice, bigotry, and narrow-mindedness, and many of our people need it sorely on these accounts. Broad, wholesome, charitable views of men and things cannot be acquired by vegetating in one little corner of the earth all one’s lifetime.” – Mark Twain, The Innocents Abroad
“The world is a book, and those who don't travel only read one page.”
― Augustine of Hippo (better known as St. Augustine)
“Don’t tell me how educated you are, tell me how much you have travelled.”
― Anonymous, The Quran
“For my part, I travel not to go anywhere, but to go. I travel for travel’s sake. The great affair is to move.” – Robert Louis Stevenson
“Traveling – it leaves you speechless, then turns you into a storyteller.” – Ibn Battuta
“The gladdest moment in human life, me thinks, is a departure into unknown lands.” – Sir Richard Burton
“No place is ever as bad as they tell you it’s going to be.” – Chuck Thompson
“I am not the same, having seen the moon shine on the other side of the world.” – Mary Anne Radmacher
“We travel not to escape life, but for life not to escape us.” – Anonymous
“The man who goes alone can start today; but he who travels with another must wait till that other is ready.” – Henry David Thoreau
“The use of traveling is to regulate imagination with reality, and instead of thinking of how things may be, see them as they are.” – Samuel Johnson
“Twenty years from now you will be more disappointed by the things you didn’t do than by the ones you did do.” – Mark Twain
I lifted most of these from
http://expertvagabond.com/best-travel-quotes/ There are many more there.