True gratitude or thankfulness to God for his kindness to us, arises from a foundation laid before, of love to God for what he is in himself; whereas… - Jonathan Edwards

For in truth the reason why men see not the loathsomness of other mens sins, or else have not courage to pass a righteous sentence upon them, It is because they were never convinced to see the plague sore of their own corruptions, never had their hearts affected with the evil of them in their own experience but their own conscience was misled out of authority, and stifled that it durst not outwardly condemn that which inwardly they could not but approve. They therefore who either do not see their own evil, or dare not proceed in open judgment to condemn, they wil either not see or not pass a righteous judgment upon others,

Nothing sets a Christian so much out of the devil's reach than humility.

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.