Joseph Smith drifting into errors after translating the Book of Mormon, is a stumbling-block to many, but only those of very weak faith would stumble on this account. Greater abominations are recorded of David in the Bible, than is recorded today of Joseph Smith; but do you reject the Psalms on this account? Do you reject the Proverbs because Solomon was a polygamist? Stop and think, you who are hasty to condemn. If you desire to know whether or not the Book of Mormon is true, read the book and investigate it, for Christ has promised that he who seeks in the right way shall find the truth of all things. We are commanded to "Prove all things; hold fast that which is good."
David Whitmer An Address to All Believers in Christ, page 4, 1887