concupiscible

Is the will divided into irascible and concupiscible?

Thomas Aquinas in the 13th century described two divisions of "sensuality": the concupiscible (pursuit/avoidance instincts) and the irascible (competition/aggression/defense instincts).

Towards the end of The Life of Avicenna, his disciple Al-Juzajani writes "The Master was vigorous in all his faculties, the sexual faculty being the most vigorous and dominant of his concupiscible faculties, and he exercised it often".