Charity is held to be the ultimate perfection of the human spirit, because it is said to both glorify and reflect the nature of God. Confusion can arise from the multiple meanings of the English word "love". The love that is caritas is distinguished by its origin, being divinely infused into the soul, and by its residing in the will rather than emotions, regardless of what emotions it stirs up. According to Aquinas, charity is an absolute requirement for happiness, which he holds as man's last goal.