What is a central idea of "To His Coy Mistress?"

"To His Coy Mistress" was written by Andrew Marvell, who was a metaphysical poet. The central idea of the poem is that of time. Metaphysical poets like Marvell and Donne were renowned for dealing with general ideas in novel and innovative ways. And "To His Coy Mistress" is no exception. Marvell wants to explore the concept of time through his relationship with his mistress. Time is short; we are mortal and one day we must die. So Marvell entreats his mistress to seize the moment and join him in an act of love-making. By doing so, the lovers will be forcing time to obey them rather than the other way round, as is normally the case. Seizing the day is the only way we have as mortal beings to control time. If we don't do this, then life will pass us by and we will go to our graves unfulfilled.
https://www.poetryfoundation.org/poems/44688/to-his-coy-mistress