In "sonnet xv," why does the speaker not think merchants need to seek for precious things in far away places? because england has enough riches and needs no more because he loves his lady enough that he needs nothing else because his lady contains all riches within herself

The answer is Because his lady contains all the riches within herself.

Sonnet XV is one of the poems from the collection of poems by Edmund Spencer called Amoretti, where he speaks about his love for Elizabeth Boil.

In this sonnet, he asks merchants why should they go so far to look for riches when his love in herself contains all the riches that can be found anywhere:

"Ye tradeful merchants, that with weary toil

do seek most precious things to make your gain,

and both the Indias of their treasures spoil,

what needeth you to seek so far in vain?

For loe my love doth in herself contain

all this world's riches that may far be found, (...)"

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