John Adams, as a child attended First Christ Church in Braintree, Massachusetts, where his father John was known as Deacon John. The 2nd president came from the lineage, Henry Adams of Barton St.David of Somerset, England. He and his wife had 9 children, 8 boys and 1 girl. Henry, one of the sons was the only one of the children who stayed in Braintree, their father having come to the colonies in 1638 as dissenters of the Church of England. Henry and his wife Hannah Bass begat John, the father of the future president. Deacon John sent his son to Harvard, a school which began as a Christian college. Eventually John became a lawyer, but his private practice was cut short due to a legal case where he defended a British soldier and won, but it resulted in John's fear he would be ostracised, but who in doing his job gained the respect of his peers. While at Harvard, he attended Holden Chappel daily. Adams at one time even considered studying devinity instead of law, but settled on law. Shortly after he opened his law practice he became a proponent of breaking away from England and was conscripted to duty, resulting in initially being asked to write the Declaration of Independence with Franklin and Jefferson. He however felt Jefferson was the man for the job and offered it to Jefferson, and Jefferson accepted the duty. While the revolution was on Adams spent many years in Paris, Amsterdam, and, eventually, London. He came back and helped write the Constitution. In 1992 he was elected Vice President. While in Philadelphia (Declaration of independence period) he attended First Christian Church. In Washington he also attended Baptist Church led by Henry Popple. He attended Methodist, Presbyterian, Quaker, and German Moravian Church and passed on them, feeling they were not as profitable as his childhood church where his father was a deacon. He even attended St.Mary Catholic Church on 5th street in Washington D.C. When he retired the presidency in 1804 he returned to Braintree, Massachusetts where he continued to attend First Christ Church, where he started. First Christ Church was not a unitarian church, it was a fundamentalist church, faithful the the fundamentals of the faith, the virgin birth, the blood atonement, salvation by grace thru faith in Christ Jesus, the bodily ressurection, the second coming of Christ in glory. That is what Adams believed, that is what he repeatedly wrote about.. that is what a reasonable person can infer from many of his letters.. In other words he was a fundamentalist Bible believing Christian. I don't say he was a Baptist, or Methodist, or Presbterian. He was a Christian, as were all but a few of our founding fathers.
As a child... And as an adult he became Unitarian...
I know it's hard for some to fathom... But most of the Founding fathers were not Christian in the sense you believe... They were at a period where Christianity was seen for what it was... :-)
Good summation of Mr. Adams faith