Thanks to my friends at Inward/Outward for this one:
Arriving and Moving On
God’s call, vocation, is twofold. God calls us saying, ‘Come and follow me.’ We arrive and then we must follow. We find but must go on seeking. God’s call is a never-ending call, to the unknown, to adventure, to follow him in the night, in solitude. It is a call incessantly to go further, and further. For it is not static but dynamic (as creation is also dynamic) and reaching him means going on and on. God’s call is like the call to become an explorer; it is an invitation to adventure.