This helps to paint a more vivid picture in the reader's mind when compared to a simile because a simile only compares the subject of beauty to the likeness of an object (e.g. a flower or the sun), simply saying that the subject is beautiful like said object. Carew, however, attributes the source of beauty to the subject he is describing, saying that the subject is the reason the flower or the sun is beautiful which creates a unique and more intense image that the reader may not have thought possible prior to this descriptive technique.
Keeping this in mind, Carew uses the first stanza to demonstrate his descriptive technique to compare the subject, presumably a woman, to a rose. By saying "Ask me no more where Jove bestows,When June is past, the fading rose" (lines 1 and 2), Carew is referring to Jove's (the ruling god of classical mythology) divine power in dictating where roses go after their season is over. The image Carew creates in these lines is that of all of the roses in the world are, essentially, in the palm of your hand and only you have the power to decide what happens with them when they no longer suited for growing. Carew then goes to say "For in your beauty's orient deep/ These flowers as in their causes, sleep" (lines 3 and 4) which redirects the already powerful image of a god handling such beauty to the woman, a mere mortal, that Carew is describing. One important word to focus on in these lines is the word 'causes' and its philosophical application. Carew's use of the word 'causes' is defined by Aristotle as the material out of which something exists which, when used in this context, means that the roses and their beauty solely exist because of the woman and that when a rose fades its beauty and essence return to the woman. This paints the picture of an eternally beautiful woman who is, in fact, the reason that roses are beautiful to begin with.
