The work of grace is not like Jonah’s gourd, which sprang up and flourished in a night, and as quickly withered, but rather like the oak, which, from a little acorn and a tender plant, advances with an almost imperceptible growth from year to year, till it becomes a broad, spreading, and deep-rooted tree, and then it stands for ages. The Christian oak shall grow and flourish for ever. When I see any soon after they appear to be awakened, making a speedy profession of great joy before they have a due acquaintance with their own hearts, I am in pain for them. I am not sorry to hear them afterwards complain that their joys are gone, and they are almost at their wits’ end; for without some such check, to make them feel their weakness and dependence, I seldom find them turn out well; either their fervour insensibly abates, till they become quite cold and sink into the world again (of which I have seen many instances), or, if they do not give up all, their walk is uneven, and their spirit has not that savour of brokenness and true humility which is the chief ornament of our holy profession. If they do not feel the plague of their hearts at first, they find it out afterwards, and too often manifest it to others. Therefore, though I know the Spirit of the Lord is free, and will not be confined to our rules, and there may be excepted cases; yet, in general, I believe the old proverb, “Soft and fair goes far,” will hold good in Christian experiences. Let us be thankful for the beginnings of grace, and wait upon our Saviour patiently for the increase. And as we have chosen him for our physician, let us commit ourselves to his management, and not prescribe to him what He shall prescribe for us. He knows us, and He loves us better than we do ourselves, and will do all things well.
– Letters of Newton, pp. 220-221.