and move and have, in them, your being, and secure a diadem
you should transmit (because no cycle yearns beyond itself,
but on itself returns) when the full sphere in wane,
the world o'erlaid long since with you, shall have in turn obeyed
some orb still prouder, some displayer, still more potent than
the last, of human will, and some new king depose the old."

This is a most important passage to get hold of in studying Browning.
It may be said to gather up Browning's philosophy of life in a nutshell.

There's a passage to the same effect in `Balaustion's Adventure',
in regard to the transmission of the poet's essence. The enthusiastic
Rhodian girl, Balaustion, after she has told the play of Euripides,
years after her adventure, to her four friends, Petale,
Phullis, Charope, and Chrusion, says: --

"I think I see how. . . you, I, or any one, might mould a new Admetos,
new Alkestis. Ah, that brave bounty of poets, the one royal race
that ever was, or will be, in this world! They give no gift that
bounds itself, and ends i' the giving and the taking:
theirs so breeds i' the heart and soul of the taker, so transmutes
the man who only was a man before, that he grows god-like in his turn,
can give -- he also: share the poet's privilege, bring forth new good,
new beauty from the old. As though the cup that gave the wine,
gave too the god's prolific giver of the grape, that vine,
was wont to find out, fawn around his footstep, springing still
to bless the dearth, at bidding of a Mainad."