From Arcana Coelestia ~ Emanuel SwedenborgThe influx from the spiritual world into man is in general of such a nature that man cannot think or will anything of himself, but everything flows in; good and truth from the Lord through heaven, thus through the angels who are with the man; evil and falsity from hell, thus through the evil spirits who are with the man; and this into the man's thought and will. This I know will appear a very great paradox because it is contrary to the appearance; but experience itself shall declare how the matter stands.
No man, spirit, or angel ever has any life from himself, thus neither can he think and will from himself; because in thinking and willing is the life of man, and speaking and acting is the life thence derived. For there is one only life, that of the Lord, which flows into all, but is variously received, and indeed according to the quality which a man has induced on his soul by his life. Hence with the evil, goods and truths are turned into evils and falsities, but with the good they are received - goods as goods, and truths as truths. This may be compared to the light of the sun flowing into objects, which is modified and varied in them diversely according to the form of the parts, and thus is turned into colors, some sad and some cheerful. While a man lives in the world he induces a form on the purest substances of his interiors, so that it may be said that he forms his soul, that is, its quality; and according to this form is received the life of the Lord, which is the life of His love toward the universal human race.
(Arcana Coelestia 5846,5847)