Points IV & V - ‘The Spiritual Combat' by Fr. Dom Lorenzo Scupoli (1530-1610); First published in …

“IV: How a man may know whether he is active in Self-Distrust and Trust in God
The presumptuous servant often supposes that he has acquired self-distrust and trust in God when the case is far otherwise. And this will be made clear to thee by the effect produced on thy mind by a fall. If thou art so saddened and disquieted thereby as to be tempted to despair of making progress or doing good, it is a sure sign that thy trust is in self and not in God. For he who has any large measure of self-distrust and trust in God feels neither surprise, nor despondency, nor bitterness, when he falls; for he knows that this has arisen from his own weakness and want of trust in God. On the contrary, being, rendered thereby more distrustful of self, more humbly confident in God, detesting above all things his fault and the unruly passions which have occasioned it, and mourning with a quiet, deep, and patient sorrow over his offense against God, he pursues his enterprise, and follows after his enemies, …More

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In Principio shares this

"Many also deceive themselves in this way, they mistake the fear and uneasiness which follow after sin for virtuous emotions; and know not that these painful feelings spring from wounded pride, and a presumption which rests upon confidence in themselves and their own strength."

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"For he who has any large measure of self-distrust and trust in God feels neither surprise, nor despondency, nor bitterness, when he falls; for he knows that this has arisen from his own weakness and want of trust in God."