The Garden of Eden was the abode of the first man and woman, and the souls of all men must pass through it after death, before they reach their final destination. For the souls of the departed must go through seven portals before they arrive in the heaven 'Arabot. There the souls of the pious are transformed into angels, and there they remain forever, praising God and feasting their sight upon the glory of the Shekinah. The first portal is the Cave of Machpelah, in the vicinity of Paradise, which is under the care and supervision of Adam. If the soul that presents herself at the portal is worthy, he calls out, "Make room! Thou art welcome!" The soul then proceeds until she arrives at the gate of Paradise guarded by the cherubim and the flaming sword. If she is not found worthy, she is consumed by the sword; otherwise she receives a pass-bill, which admits her to the terrestrial Paradise. Therein is a pillar of smoke and light extending from Paradise to the gate of heaven, and it depends upon the character of the soul whether she can climb upward on it and reach heaven. The third portal, Zebul, is at the entrance of heaven. If the soul is worthy, the guard opens the portal and admits her 'to the heavenly Temple. Michael presents her to God, and conducts her to the seventh portal, 'Arabot, within which the souls of the pious, changed to angels, praise the Lord, and feed on the glory of the Shekinah.[49] In Paradise stand the tree of life and the tree of knowledge, the latter forming a hedge about the former. Only he who has cleared a path for himself through the tree of knowledge can come close to the tree of life, which is so huge that it would take a man five hundred years to traverse a distance equal to the diameter of the trunk, and no less vast is the space shaded by its crown of branches. From beneath it flows forth the water that irrigates the whole earth,[50] parting thence into four streams, the Ganges, the Nile, the Tigris, and the Euphrates.[51] But it was only during the days of creation that the realm of plants looked to the waters of the earth for nourishment. Later on God made the plants dependent upon the rain, the upper waters. The clouds rise from earth to heaven, where water is poured into them as from a conduit.[52] The plants began to feel the effect of the water only after Adam was created. Although they had been brought forth on the third day, God did not permit them to sprout and appear above the surface of the earth, until Adam prayed to Him to give food unto them, for God longs for the prayers of the pious.[53]