Can you discuss immature love to mature love in John Donne's poetry?
I'm not exactly sure what you are asking, but I can provide at least one example in Donne's poetry that develops the idea of immature love versus mature love. In "The Good Morrow," the speaker of the poem describes the two lovers' lives before they met as childish. The two lovers before meeting each other "sucked on country pleasures," and they were not "weaned." Their previous loves with others were immature, unsophisticated, and fantastical. It was as if they each had been sleeping until they met.
Mature love is described in the third and last stanza of the poem. The two lovers are united body and soul, so much so that they see the reflection of themselves in each other's eyes. Here the speaker describes a love that is perfectly reciprocated and therefore will last until eternity:
If our two loves be one, or thou and I
Love so alike that none can slacken, none can die.
Unlike the immature or inferior loves of their pasts, the lovers now share a more perfect love because it is spiritual as well as physical. In this way, their love is self-sufficient and undying.