In a letter concerning election and predestination:
“Permit me to remind you, in the first place, of that important aphorism, John iii. 27, (which, by the bye, seems to speak strongly in favour of the doctrines in question): “A man can receive nothing, except it be given him from Heaven.” If you should accede to my opinions upon my persuasion only, you would be little benefited by the exchange. The Lord alone can give us the true, vital, comfortable, and useful knowledge of his own truths. We may become wise in notions, and so far masters of a system, or scheme of doctrine, as to be able to argue, object, and fight, in favour of our own hypothesis, by dint of application, and natural abilities ; but we rightly understand what we say, and whereof we affirm, no farther than we have a spiritual perception of it wrought in our hearts by the power of the Holy Ghost. It is not, therefore, by noisy disputation, but by humble waiting upon God in prayer, and a careful perusal of his holy word, that we are to expect a satisfactory, experimental, and efficacious knowledge of the truth as it is in Jesus. I am persuaded that you are seeking in this way: if so, I am confident you shall not seek in vain. The Lord teaches effectually, though for the most part gradually. The path of the just is compared to the light, which is very faint at the early dawn, but shineth more and more to the perfect day.” —John Newton, The Works of John Newton, Vol. 1
No Other Boast 