Tertullian

For, when one reads of God as being "the searcher and witness of the heart; " when His prophet is reproved by His discovering to him the secrets of the heart; when God Himself anticipates in His people the thoughts of their heart, "Why think ye evil in your hearts? " when David prays "Create in me a clean heart, O God," and Paul declares, "With the heart man believeth unto righteousness," and John says, "By his own heart is each man condemned; " when, lastly, "he who looketh on a woman so as to lust after her, hath already committed adultery with her in his heart," -then both points are cleared fully up, that there is a directing faculty of the soul, with which the purpose of God may agree; in other words, a supreme principle of intelligence and vitality (for where there is intelligence, there must be vitality), and that it resides in that most precious part of our body to which God especially looks: so that you must not suppose, with Heraclitus, that this sovereign faculty of which we are treating is moved by some external force; nor with Moschion, that it floats about through the whole body; nor with Plato, that it is enclosed in the head; nor with Zenophanes, that it culminates in the crown of the head; nor that it reposes in the brain, according to the opinion of Hippocrates; nor around the basis of the brain, as Herophilus thought; nor in the membranes thereof, as Strato and Erasistratus said; nor in the space between the eyebrows, as Strato the physician held; nor within the enclosure of the breast, according to Epicurus: but rather, as the Egyptians have always taught, especially such of them as were accounted the expounders of sacred truths; in accordance, too, with that verse of Orpheus or Empedocles:

We must after all this turn our attention to those scriptures also which forbid our belief in such a resurrection as is held by your Animalists (for I will not call them Spiritualists), that it is either to be assumed as taking place now, as soon as men come to the knowledge of the truth, or else that it is accomplished immediately after their departure from this life... Who has yet beheld Jesus descending from heaven in like manner as the apostles saw Him ascend, according to the appointment of the two angels? [Acts 1:11] Up to the present moment they have not, tribe by tribe, smitten their breasts, looking on Him whom they pierced. [John 19:37; Zechariah 12:10] No one has as yet fallen in with Elias; [Malachi 4:5] no one has as yet escaped from Antichrist; [1 John 4:3] no one has as yet had to bewail the downfall of Babylon. [Revelation 18:2] And is there now anybody who has risen again, except the heretic? He, of course, has already quitted the grave of his own corpse — although he is even now liable to fevers and ulcers; he, too, has already trodden down his enemies — although he has even now to struggle with the powers of the world. And as a matter of course, he is already a king — although he even now owes to Cæsar the things which are Cæsar's. [Matthew 22:21]