Thomas Jefferson Promotes Rational Christianity

In a very anti-Trinitarian context. It was to Timothy Pickering February 27, 1821. As Jefferson writes:

I thank you for Mr. Channing's discourse, which you have been so kind as to forward me. It is not yet at hand, but is doubtless on its way. I had received it through another channel, and read it with high satisfaction. No one sees with greater pleasure than myself the progress of reason in its advances towards rational Christianity. When we shall have done away the incomprehensible jargon of the Trinitarian arithmetic, that three are one, and one is three; when we shall have knocked down the artificial scaffolding, reared to mask from view the simple structure of Jesus; when, in short, we shall have unlearned everything which has been taught since His day, and got back to the pure and simple doctrines He inculcated, we shall then be truly and worthily His disciples; and my opinion is that if nothing had ever been added to what flowed purely from His lips, the whole world would at this day have been Christian.