The believer is sensible of his infirmities, for it is supposed that he is wrestling under them. He sees, he feels, that he is not man enough for his work; that his own hands are not sufficient for him, nor his own back for his burden; this is what drives him out of himself to the grace that is in Christ Jesus. And thus he lies open to the help of the Spirit, while proud nature in unbelievers is left helpless.
Thomas BostonSaving faith is the faith of God's elect; the special gift of God to them, wrought in them by his Spirit.
Thomas BostonBelieving, repenting, and the like, are the product of the new nature; and can never be produced by the old corrupt nature... as the child cannot be active in his own generation, so a man cannot be active in his own regeneration. The heart is shut against Christ: man cannot open it, only God can do it by his grace.
Thomas Boston