Burn the bridge, challenge yourself to the new territory, give your best because until the bridge is there to go back, you will never give 100% in the new territory.
But when needed, you should be able to rebuild that bridge you have burnt. Burn it if you have the capacity and resources to rebuild and if you can leave the ego behind and can bridge back.
Burn the bridge, because you want to expand your own self in the new place, not because you don’t want to go back ever.
Think Big. Be Wise