In a world without God, time doesn’t really make sense. Or rather, at a minimum, the concept of time doesn’t. Time is always moving, always changing; one second is always becoming the next… As a thing that is always becoming, then, can time self-originate?
If time is self-originating, when did it self-originate?
Thus, the question is: can that which is ever changing spontaneously come into being? Herman Bavinck, in Reformed Dogmatics (vol 2), argues no. In fact, he says, for time to exist on its own is entirely inconceivable:
God, the eternal One, is the only absolute cause of time. In and by itself time cannot exist or endure: it is a continuous becoming and must rest in immutable being. It is God who by his eternal power sustains time, both in its entirety and in each separate moment of it. God pervades time and every moment of time with his eternity. In every second throbs the heartbeat of eternity. … He makes time subservient to eternity and thus proves himself to be the King of the ages (1 Tim. 1:17). (164)
When we consider the created world around us, it is not only the beauty of nature and the wonder of human ingenuity that testify to our Creator—time itself bears him witness, and indicts us in our neglect of giving honor and thanks to him. For time does not self-originate; God created it, and he sustains it. “In every second throbs the heartbeat of eternity.” Do you see it?