I find no peace, and all my war is done:
I fear, and hope; I burn, and freeze like ice;
I fly above the wind, yet can I not arise;
And nought I have, and all the world I seize on;
That the speaker opens a sonnet by conveying persisting discontent truly conveys the tone of the piece immediately. Where many sonnets wholly pertain to  unrequited love , this particular piece conveys the speaker’s discontents with a cause less overtly stated, that “I love another, and thus I hate myself”. 
 Of course, at the end of a war, one expects peace, but the speaker states that though “all [my] war is done”, “I find no peace”. This contrast is furthered throughout, portraying the speaker’s situation as perhaps contradicting, or contrasting—he is being pulled from different directions, “I fly above the wind, yet can I not arise”. 

I find no peace and all my war is done...