- Is operation the proper cause of pleasure?
- Is movement a cause of pleasure?
- Do hope and memory cause pleasure?
- Does sadness cause pleasure?
- Are the actions of others a cause of pleasure to us?
- Is doing good to another a cause of pleasure?
- Is likeness a cause of pleasure?
- Is wonder a cause of pleasure?
"It is because the contemporary alternatives seem so one-sided and are not more evidently solutions to the problems which Thomas faced, and partly solved, that we return to him and to the tradition of theology and philosophy in which his Summa Theologiae appears: theology as the science of the first principle and this as the total knowledge of reality in its unity." -- Wayne J. Hankey, God in Himself (Oxford University Press, 1987), p.159.