Great people like us operate on the principle of rockets…. Not that we aim for the sky but until and unless our ass is on fire, we are not going to work.
Challenges are like trees seen through a running train. As you approach them they grow bigger, once you pass them they become smaller! So never be afraid of them.
In the end, only three things matter the most: How fully you lived, how deeply you loved and how well you learned to let go of things not meant for you!