I'm having a little bit of a hard time juggling work and writing, I'm sorry I didn't get back sooner. I agree that Adam's seems to rely heavily on reason and logic. And that he thought that Christianity had become corrupt (which may, or may not be a bad thing). However, based on some of these quotes, he seems to consider himself a Christian.
I always consider the settlement of America with reverence and wonder, as the opening of a grand scene and design in providence, for the illumination of the ignorant and the emancipation of the slavish part of mankind all over the earth. -John Adams
We have no government armed with power capable of contending with human passions unbridled by morality and religion. Avarice, ambition, revenge or gallantry would break the strongest cords of our Constitution as a whale goes through a net. Our Constitution is designed only for a moral and religious people. It is wholly inadequate for any other. -John Adams
Statesmen, my dear Sir, may plan and speculate for Liberty, but it is Religion and Morality alone, which can establish the Principles upon which Freedom can securely stand. The only foundation of a free Constitution is pure Virtue, and if this cannot be inspired into our People in a greater Measure than they have it now, They may change their Rulers and the forms of Government, but they will not obtain a lasting Liberty. They will only exchange Tyrants and Tyrannies. -John Adams
I am surprised at the suddenness as well as the greatness of this revolution... It is the will of Heaven that the two countries should be sundered forever. It may be the will of Heaven that America shall suffer calamities still more wasting, and distresses yet more dreadful. If this is to be the case it will have this good effect at least. It will inspire us with many virtues which we have not, and correct many errors, follies, and vices which threaten to disturb, dishonor, and destroy us. The furnace of affliction produces refinement in states as well as individuals. And the new Governments we are assuming in every part will require a purification from our vices, and an augmentation of our virtues, or they will be no blessings. The people will have unbounded power, and the people are extremely addicted to corruption and venality, as well as the great. But I must submit all my hopes and fears to an overruling Providence, in which, unfashionable as the faith may be, I firmly believe. -John Adams
The second day of July, 1776, will be the most memorable epocha in the history of America. I am apt to believe that it will be celebrated by succeeding generations as the great anniversary festival. It ought to be commemorated as the day of deliverance, by solemn acts of devotion to God Almighty. It ought to be solemnized with pomp and parade, with shows, games, sports, guns, bells, bonfires, and illuminations, from one end of this continent to the other, from this time forward forevermore. -John Adams
I will insist that the Hebrews have done more to civilize men than any other nation. If I were an atheist, and believed in blind eternal fate, I should still believe that fate had ordained the Jews to be the most essential instrument for civilizing the nations. If I were an atheist of the other sect, who believe or pretend to believe that all is ordered by chance, I should believe that chance had ordered the Jews to preserve and propagate to all mankind the doctrine of a supreme, intelligent, wise, almighty sovereign of the universe, which I believe to be the great essential principle of all morality, and consequently of all civilization. -John Adams
Indeed, Mr. Jefferson, what could be invented to debase the ancient Christianism which Greeks, Romans, Hebrews and Christian factions, above all the Catholics, have not fraudulently imposed upon the public? Miracles after miracles have rolled down in torrents. -John Adams
I really wish the Jews again in Judea an independent nation. -John Adams
Liberty cannot be preserved without a general knowledge among the people, who have a right, from the frame of their nature, to knowledge, as their great Creator, who does nothing in vain, has given them understandings, and a desire to know; but besides this, they have a right, an indisputable, unalienable, indefeasible, divine right to that most dreaded and envied kind of knowledge, I mean, of the characters and conduct of their rulers. -John Adams