“True Christian fortitude consists in strength of mind, through grace, exerted in two things; in ruling and suppressing the evil and unruly passions and affections of the mind; and in steadfastly and freely exerting and following good affections and dispositions, without being hindered by sinful fear or the opposition of enemies... Though Christian fortitude appears in withstanding and counteracting the enemies that are without us; yet it much more appears in resisting and suppressing the enemies that are within us; because they are our worst and strongest enemies and have greatest advantage against us. The strength of the good soldier of Jesus Christ appears in nothing more than in steadfastly maintaining the holy calm, meekness, sweetness, and benevolence of his mind, amidst all the storms, injuries, strange behaviour, and surprising acts and events of this evil and unreasonable world.”

“True virtue never appears so lovely as when it is most oppressed; and the divine excellency of real Christianity is never exhibited with such advantage as when under the greatest trials; then it is that true faith appears much more precious than gold, and upon this account is "found to praise and honour and glory.”

“Take away all the moral beauty and sweetness in the Word, and the Bible is left wholly a dead letter, a dry, lifeless, tasteless thing. By this is seen the true foundation of our duty, the worthiness of God to be so esteemed, honoured, loved, submitted to, and served, as He requires of us, and the amiableness of the duties themselves that are required of us. And by this is seen the true evil of sin; for he who sees the beauty of holiness must necessarily see the hatefulness of sin, its contrary. By this men understand the true glory of heaven, which consists in the beauty and happiness that is in holiness. By this is seen the amiableness and happiness of both saints and angels. He that sees beauty of holiness, or true moral good, sees the greatest and most important thing in the world, which is the fulness of all things, without which all the world is empty, no better than nothing, yea, worse than nothing. Unless this is seen, nothing is seen that is worth the seeing; for there is no other true excellency or beauty. Unless this be understood, nothing is understood that is worthy of the exercise of the noble faculty of understanding. This is the beauty of the Godhead, and the divinity of Divinity (if I may so speak), the good of the infinite Fountain of good; without which, God Himself (if that were possible) would be an infinite evil; without which we ourselves had better never have been; and without which there had better have been no being.”

“But yet it is evident that religion consists so much in affection, as that without holy affection there is no true religion; and no light in the understanding is good which does not produce holy affection in the heart: no habit or principle in the heart is good which has no such exercise; and no external fruit is good which does not proceed from such exercises.”

“The spirit of bondage works by fear for the slave fears the rod: but love cries, Abba, Father; it disposes us to go to God, and behave ourselves towards God as children; and it gives us clear evidence of our union to God as His children, and so casts out fear. So that it appears that the witness of the Spirit the apostle speaks of, is far from being any whisper, or immediate suggestion or revelation; but that gracious holy effect of the Spirit of God in the hearts of the saints, the disposition and temper of children, appearing in sweet childlike love to God, which casts out fear or a spirit of a slave.”

“The deceitfulness of the heart of man appears in no one thing so much as this of spiritual pride and self-righteousness. The subtlety of Satan appears in its height, in his managing persons with respect to this sin. And perhaps one reason may be that here he has most experience; he knows the way of its coming in; he is acquainted with the secret springs of it: it was his own sin. Experience gives vast advantage in leading souls, either in good or evil.”

“Religion consists much in holy affection; but those exercises of affection which are most distinguishing of true religion are these practical exercises. Friendship between earthly friends consists much in affection; but those strong exercises of affection that actually carry them through fire and water for each other are the highest evidences of true friendship.”