Nicolas Bouvier said this quote

Traveling outgrows its motives. It soon proves sufficient in itself. You think you are making a trip, but soon it is making you - or unmaking you.

~ Nicolas Bouvier

That day, I really believed that I had grasped something and that henceforth my life would be changed. But insights cannot be held for ever. Like water, the world ripples across you and for a while you take on its colours. Then it recedes, and leaves you face to face with the void you carry inside yourself, confronting that central inadequacy of soul which you must learn to rub shoulders with and to combat, and which, paradoxically, may be our surest impetus.

~ Nicolas Bouvier