Explanation: Thy firmness makes……. where I begun from Forbidding Mourning
Thy firmness makes my circle just,
And makes me end, where I begun.
These are the concluding lines of “A Valediction: Forbidding Mourning” composted by John Donne. Here he has compared himself to a foot of a compass and his beloved to the other foot of the compass.
According to the poet though their souls are not one but two, even so they are like the compass.
Like the compass, they have one central point and two feet. One foot of the compass may remain fixed in the center and other foot works around of the circle. His beloved will be like the fixed foot of the compass, because she is staying at home. He will be like the other foot of the compass which removes in a circle just as the revolving foot of the compass, returns to the central point after completing the circle, in the same way the poet shall return to his beloved. Thus, they will again be united in pure love.
Here the love of the author is completely pure and realistic.