If I were to try and explain in astronomical terms the beginning and end of time, it would never depict the beginning and end of time in Eternity.
There is always an 'ago' and there is always an 'after' to every point in time. The 'yesterdays' of the past and the 'tomorrows' of the future hinge on a point in time which is the NOW of the present moment in Eternity.
In a flight of imagination imagining the beginning and the end of the NOW of the present moment in Eternity, one can at the most either add or subtract a measure of time; but this would be nothing more than an adding or erasing of zeros. No amount of swing, even of aeons of cycles, in the sweep of time can give an iota of concept of any beginning or end of the NOW in Eternity.
THE EVERYTHING AND THE NOTHING, p. 90
1989 © Avatar Meher Baba Perpetual Public Charitable Trust