We have now to consider the soul's passions in particular, and (1) the passions of the concupiscible faculty; (2) the passions of the irascible faculty.
The first of these considerations will be threefold: since we shall consider (1) Love and hatred; (2) Desire and aversion; (3) Pleasure and sadness.
Concerning love, three points must be considered: (1) Love itself; (2) The cause of love; (3) The effects of love.
Under the first head there are four points of inquiry:
A1 Whether love is in the concupiscible power?
A2 Whether love is a passion?
A3 Whether love is the same as dilection?
A4 Whether love is properly divided into love of friendship, and love of concupiscence?