“So if Muslims don’t worship the one true God, then they are worshipping a false god. They’ve been deceived into thinking that they are serving God, but really, they are not, and sadly they are headed for an eternity separated from God. This should break our hearts as Christians. We have the message of salvation that all people need to hear. Millions of Muslims live here in the United States, and they need to hear about the one true God who came as a man, died for their sin, rose again, and now offers the free gift of salvation to all who will confess Christ as Lord and trust in Him (Romans 10:9). We need to tell others about this precious gift!”

Twitter post https://twitter.com/McCormickProf/status/965423906436866049 (18 February 2018)
2018

Source: A Key into the Language of America (1643), Ch. 21 "Of their Religion"
Context: I was persuaded and am, that God's way is first to turn a soul from its idols, both of heart, worship, and conversation, before it is capable of worship to the true and living God... the two first principles and foundations of true religion, or worship of the true God in Christ, are repentance from dead works, and faith towards God, before the doctrine of baptism or washing, and the laying on of hands, which contain the ordinances and practices of worship; the want of which I conceive is the bane of millions of souls in England and all other nations professing to be Christian nations, who are brought by public authority to baptism and fellowship with God in ordinances of worship, before the saving work of repentance and a true turning to God.

Drafts on the history of the Church (Section 3). Yahuda Ms. 15.3, National Library of Israel, Jerusalem, Israel. 2006 Online Version at Newton Project http://www.newtonproject.sussex.ac.uk/view/texts/normalized/THEM00220

The Brothers Karamazov (1879–1880)

Spoken on March 10, 1983

See the Positive Atheism http://www.positiveatheism.org/hist/quotes/jeffphony.htm site on the extreme unlikelihood of this quote being authentic. It actually contains some known phrases of Jefferson's, but they are compounded with almost certainly false statements into a highly misrepresentative whole. Jefferson's own opinions on Jesus, God, Christianity and general opinions about them were far more complex than is indicated in this statement.
Misattributed

The World As Revelation: Names of Gods (1980)

¶ 8 - 9.
An Humble, Earnest and Affectionate Address to the Clergy (1761)
Context: God could not make the creature to be great and glorious in itself; this is as impossible, as for God to create beings into a state of independence on himself. "The heavens," saith David, "declare the glory of God"; and no creature, any more than the heavens, can declare any other glory but that of God. And as well might it be said, that the firmament shows forth its own handiwork, as that a holy divine or heavenly creature shows forth its own natural power.
But now, if all that is divine, great, glorious, and happy, in the spirits, tempers, operations, and enjoyments of the creature, is only so much of the greatness, glory, majesty, and blessedness of God, dwelling in it, and giving forth various births of his own triune life, light, and love, in and through the manifold forms and capacities of the creature to receive them, then we may infallibly see the true ground and nature of all true religion, and when and how we may be said to fulfill all our religious duty to God. For the creature's true religion, is its rendering to God all that is God's, it is its true continual acknowledging all that which it is, and has, and enjoys, in and from God. This is the one true religion of all intelligent creatures, whether in heaven, or on earth; for as they all have but one and the same relation to God, so though ever so different in their several births, states or offices, they all have but one and the same true religion, or right behavior towards God. Now the one relation, which is the ground of all true religion, and is one and the same between God and all intelligent creatures, is this, it is a total unalterable dependence upon God, an immediate continual receiving of every kind, and degree of goodness, blessing and happiness, that ever was, or can be found in them, from God alone. The highest angel has nothing of its own that it can offer unto God, no more light, love, purity, perfection, and glorious hallelujahs, that spring from itself, or its own powers, than the poorest creature upon earth. Could the angel see a spark of wisdom, goodness, or excellence, as coming from, or belonging to itself, its place in heaven would be lost, as sure as Lucifer lost his. But they are ever abiding flames of pure love, always ascending up to and uniting with God, for this reason, because the wisdom, the power, the glory, the majesty, the love, and goodness of God alone, is all that they see, and feel, and know, either within or without themselves. Songs of praise to their heavenly Father are their ravishing delight, because they see, and know, and feel, that it is the breath and Spirit of their heavenly Father that sings and rejoices in them. Their adoration in spirit and in truth never ceases, because they never cease to acknowledge the ALL of God; the ALL of God in the whole creation. This is the one religion of heaven, and nothing else is the truth of religion on earth.

Riyadh-as-Saliheen by Imam Al-Nawawi, Hadith 376
Sunni Hadith