My utmost for his highest. To be all for God; to act with boldness, expressing Christ in every word and deed. This, Paul says, is how to walk through life unashamed.
The journey isn’t a journey of reason or debate. We can’t think or argue our way through it. It is a journey of surrender, of abandoning ourselves to God, absolutely and forever.
There will always be good reasons not to. We debate with God, telling him that we are concerned for others, that if we start on the journey, our loved ones will suffer. Really, we are worried for ourselves, for our own comfort and safety. We tell God he doesn’t know what he’s asking.
Keep to the point: he does know. Shut out your worries and stand before God with one thing only in your heart: my utmost for his highest. Determine to be absolutely and entirely for him and him alone.
My best for his glory. At first, the call comes gently. Then it grows louder, until finally God produces a crisis in our lives that demands we make a choice. For or against; yes or no; stay or go.
Has the crisis come to you? If it has, go. Paul, like Christ, would let nothing deter him, whether it meant life or death. As a new year dawns, let us embrace this same spirit, surrendering all with boldness and with joy.

Wisdom from Oswald

The attitude of a Christian towards the providential order in which he is placed is to recognize that God is behind it for purposes of His own.  Biblical Ethics, 99 R