Brothers, I do not consider that I have made it my own. But one thing I do: forgetting what lies behind and straining forward to what lies ahead, I press on toward the goal for the prize of the upward call of God in Christ Jesus.
Phil. 3:13-14 ESV
The future is that which will be; that which will exist at any time after the present moment; the next second is future as opposed to what has happened and is happening. For the believer, the future is not to be feared, but placed into the hands of an all-knowing, all-sovereign God. “Therefore do not be anxious about tomorrow, for tomorrow will be anxious for itself. Sufficient for the day is its own trouble” (Matt. 6:34 ESV). The Christian places his or her confidence about the future in a God who is all-loving, all-wise, and all-powerful. Believers are assured, not anxious about the future: the Cross has taken care of our past, present, and future sin.
Precisely this the curiosity of the believer: it means forging ahead and not looking back. If the believer is not afraid of the mystery of the future, it is not for any heroic reason, for he knows who ordains the future and who yet does not allow the future to become our undoing. The believer knows who sets the goals and guarantees them. In this knowledge the restlessness of all our thoughts and quests abate.
Helmut Thielicke, Notes From a Wayfarer: The Autobiography of Helmut Thielicke, trans., David R. Law (New York, Paragon House, 1995), 418.