This is the first line of my next sonnet

This is the first line of my next sonnet
quickly followed by the second line
the third line has those two stacked upon it
the fourth one, last in the quatrain, is fine

In the fifth line we continue the thought
and with the sixth go on supporting it
by the seventh line the sonnet ought
to let the eighth wrap up the gist of it

But the ninth line begins to contradict
the tenth continues contrary ideas
line eleven nears the end of the script
of line twelve's concluding panaceas

By line thirteen it is finally time
for fourteen to be the sonnet's punchline