“This world flows on without beginning.” — Vasubandhu
The problem with the idea of the absolute beginning is causality: nothing happens without a cause, and for every cause there must be a cause, and so on into the infinity of time; causality and temporality are inseparable; the absolute beginning seems impossible. However, causality and temporality do not exclude the possibility of supracausality and supratemporality of Transcendence, which we, constrained by causality and temporality, cannot in principle imagine. Thus, the infinite and eternal universe of transcendental subjects and intersubjectively constituted/projected phenomenal worlds (e.g., this particular world) could be created in a mysterious way: instead of philosophically struggling with the unthinkable absolute beginning of our individual existence (the stream of successive states of consciousness), we can think of all discrete states of consciousness — all "moments of time" — as of the eternal act of creation. So if there is a beginning, it is now. Right now. Forever now.