What is the theme of Sir Thomas Wyatt's poem "Is It Possible?"

The theme of this poem is love and the uncertainty and
difficulty that comes with love.  In the poem, the author is asking a series of
rhetorical questions about the ways in which love can seem impossible to
understand.

The author focuses mainly on the feeling of
uncertainty that comes with love.  He talks about how hearts can change as easily as the
weather, implying that love can be fickle and changing and therefore uncertain and
difficult to understand.  He talks about how someone's emotions can go from lowest to
highest and back again, all because of love.

A person who
has been in love will recognize these feelings from their own experience -- the highs,
the lows, the uncertainty, the confusion.  This is the major theme of this
poem.