In act 3 of The Crucible, what does John openly admit to Danforth?

In act 3
of , John Proctor goes to the court in order to free his wife. During this
testimony, he admits a number of things to Danforth and all those present.

First, he says Mary Warren "never saw no spirits." This is news to Danforth,
as Mary has spent other days in court following Abigail's lead in claiming citizens have sent
their spirits out to bewitch the girls.

Other characters do not approve of
John's testimony and seek to undermine him by informing Danforth of his various faults. Cheever
tells Danforth that when they arrested Elizabeth (in act 2), "he damned the court and
ripped your warrant." Hale is also a witness to this, and so John must admit "It were
a temper, sir. I knew not what I did."

Parris then puts forth the fact
that John does not come to church every Sunday, the way a good Christian is expected to. John
must admit the truth of this as well: "I have no love for Mr. Parris. It is no secret. But
God I surely love."

Danforth is an outsider, and so he learns these
things about John. The other citizens are familiar with John's behaviors and can attest to them,
so John must openly admit the truth of the public knowledge to Danforth.

Cheever pipes up that John plows on Sundays. Again, John cannot deny this and can only
admit the truth and try to explain that last year he had to plow on a few Sundays because the
land was giving little and he needed to provide for his three children.

John
confesses these things to show his honesty. But when the court continues to believe Abigail's
testimony, he finally admits that he had an affair with her. He admits the reason Abigail was
dismissed from his service is because Elizabeth found out about the
affair.