In this quatrain, he uses the language of commerce to develop the idea: cancelled woe and expenses. Quatrain 2 begins with the transition word “Then,” suggesting that it is connected to Quatrain 1, but moving on to a further development of the idea: when I'm in a nostalgic mood like that, I can cry freely about friends who have passed away or been otherwise lost to me.This quatrain uses legal terminology to get the point across: sessions and summons. Quatrain 1 introduces the situation: Sometimes, when I think about the past, I regret the things and people I've lost.
It may help to examine an example, such as Shakespeare's 'Sonnet 30':
The turn, which occurs in the 13th line of the Shakespearean sonnet, offers a resolution or insight into to the problem developed in the first three quatrains. Each quatrain should build toward the final couplet, where you will have a turn, or a volta. Think of each quatrain as a little thought bubble, like a paragraph, in which you explore an element of the subject of your poem. Although your poem should have a single focus, each stanza of the sonnet should develop the idea further.