599.
In order that man may be in freedom, to the end that he may be reformed, he is conjoined in respect to his spirit both with heaven and with hell. For with every man there are spirits from hell and angels
from heaven. It is by means of hell that man is in his own evil, while it is by means of angels from heaven that man is in good from the Lord; thus is he in spiritual equilibrium, that is, in freedom.
That angels from heaven and spirits from hell are joined to every man may be seen in the chapter on the conjunction of heaven with the human race (n. 291-302).