Here's a few quotes about goodbyes/traveling/inspiration I found online that seemed fitting:
Nothing makes the earth seem so spacious as to have friends at a distance; they make the latitudes and longitudes. ~Henry David Thoreau
Be the change you wish to see in the world. - Gandhi
Only in the agony of parting do we look into the depths of love. ~George Eliot
Man's feelings are always purest and most glowing in the hour of meeting and of farewell. ~Jean Paul Richter
Do not follow where the path may lead. Go instead where there is no path and leave a trail - Ralph Waldo Emerson
“Not all those who wander are lost.” - J. R. R. Tolkien
“The whole object of travel is not to set foot on foreign land; it is at last to set foot on one’s own country as a foreign land.” - G. K. Chesterton
Only a life lived for others is a life worthwhile. - Albert Einstein