Only the keeping of resolutions Jonathan Edwards wrote this in his personal journal.

“I perceive, if God should withdraw his Spirit a little more, I should not hesitate to break my resolutions, and should soon arrive at my old state. There is no dependence on myself. Our resolutions may be at the highest one day, and yet, the next day, we may be in a miserable dead condition, not at all like the same person who resolved. So that it is to no purpose to resolve, except we depend on the grace of God. For, if it were not for his mere grace, one might be a very good man one day, and a very wicked one the next.”

Excerpt From: “The Works of Jonathan Edwards: Volume I & II”.
2 Volume Hardback or Kindle Edition at Amazon.

“The habits of study, which Edwards formed in very early youth, were not only strict and severe, and this in every branch of literature, but in one respect peculiar. Even while a boy, he began to study with his pen in his hand; not for the purpose of copying off the thoughts of others, but for the purpose of writing down, and preserving, the thought suggested to his own mind, from the course of study which he was pursuing. This most useful practice he commenced in several branches of study very early; and he steadily pursued it in all his studies through life. His pen appears to have been in a sense always in his hand. From this practice steadily persevered in, he derived the very great advantages of thinking continually during each period of study; of thinking accurately; of thinking connectedly; of thinking habitually at all times; of banishing from his mind every subject, which was not worthy of continued and systematic thought; of pursuing each given subject of thought as far as he was able, at the happy moment when it opened spontaneously on his mind; of pursuing every such subject afterwards, in regular sequence, starting anew from the point where he had previously left off, when again it opened upon him in some new and interesting light; of preserving his best thoughts, associations, and images, and then arranging them under their proper heads, ready for subsequent use; of regularly strengthening the faculty of thinking and reasoning, by constant and powerful exercise; and above all, of gradually moulding himself into a thinking being — a being, who instead of regarding thinking and reasoning as labour, could find no high enjoyment but in intense, systematic, and certain thought. In this view of the subject, when we remember how few students comparatively, from want of this mental discipline, think at all; how few of those who think at all, think habitually; how few of those who think habitually, think to purpose; and how few of those who think to purpose, attain to the fulness of the measure of the stature, to which, as thinking beings, they might have attained; it will not I think be doubted, that the practice in question was the principal means of the ultimate development of his mental superiority.“

Excerpt From: “The Works of Jonathan Edwards: Volume I & II”.
2 Volume Hardback or Kindle Edition at Amazon.

Emphasis mine.
-Kevin