Every religion consists of moral precepts, & of dogmas. In the first they all agree. All forbid us to murder, steal, plunder, bear false witness Etc. and these are the articles necessary for the preservation of order, justice, & happiness in society. In their particular dogmas all differ; no two professing the same. These respect vestments, ceremonies, physical opinions, & metaphysical speculations, totally unconnected with morality, & unimportant to the legitimate objects of society. Yet these are the questions on which have hung the bitter schisms of Nazarenes, Socinians, Arians, Athanasians in former times, & now of Trinitarians, Unitarians, Catholics, Lutherans, Calvinists, Methodists, Baptists, Quakers Etc. Among the Mahometans we are told that thousands fell victims to the dispute whether the first or second toe of Mahomet was longest; & what blood, how many human lives have the words ‘this do in remembrance of me’ cost the Christian world!

We all agree in the obligation of the moral precepts of Jesus: but we schismatize & lose ourselves in subtleties about his nature, his conception maculate or immaculate, whether he was a god or not a god, whether his votaries are to be initiated by simple aspersion, by immersion, or without water; whether his priests must be robed in white, in black, or not robed at all; whether we are to use our own reason, or the reason of others, in the opinions we form, or as to the evidence we are to believe. It is on questions of this, & still less importance, that such oceans of human blood have been spilt, & whole regions of the earth have been desolated by wars & persecutions, in which human ingenuity has been exhausted in inventing new tortures for their brethren.

It is time then to become sensible how insoluble these questions are by minds like ours, how unimportant, & how mischievous; & to consign them to the sleep of death, never to be awakened from it. The varieties in the structure & action of the human mind, as in those of the body, are the work of our creator, against which it cannot be a religious duty to erect the standard of uniformity.

Thomas Jefferson (1743-1826) American political philosopher, polymath, statesman, US President (1801-09)

Letter to James Fishback [draft] (27 Sep 1809)
    (Source)

Jefferson seriously dialed back his actual response, though he kept both in his files; the final letter read, in this passage:

The interests of society require the observation of those moral precepts only in which all religions agree, (for all forbid us to murder, steal, plunder, or bear false witness.) and that we should not intermeddle with the particular dogmas in which all religions differ, and which are totally unconnected with morality. in all of them we see good men, & as many in one as another. The varieties in the structure & action of the human mind as in those of the body, are the work of our creator, against which it cannot be a religious duty to erect the standard of uniformity.