Emanuel Swedenborg, Angelic Wisdom Concerning the Divine Love and the Divine Wisdom
“ By the heart and its extension into the body through the arteries and veins it can be seen that love or the will is the life of man, for the reason that things that correspond to each other act in a like manner, except that one is natural and the other spiritual. How the heart acts in the body is evident from anatomy, which shows that wherever the heart acts by means of the vessels put forth from it, everything is alive or subservient to life; but where the heart by means of its vessels does not act, everything is lifeless. Moreover, the heart is the first and last thing to act in the body. ”
