Homesickness

I am reading a book on homesickness called Uprooted. The author nails it: "When your desires and wants and longings stop you from seeing the opportunities, lessons, work and blessings where the Lord has put you, homesickness becomes spiritually crippling."

I have felt homesick before but I'm thankful I have yet to experience it in this location. I anticipate it in the future with our world travels and international moves. So why not gain some insight and perhaps arm myself with Biblical truth before I need it?