All Israel has a share in the World to Come, as it is stated: And your people are all righteous, they shall inherit the land for-ever; the branch of my plantings, the work of my hands to be glorified.  These are the ones who have no share in the World to Come: One who says there is no [basis for] the resurrection in the Torah, [one who says] that the Torah is not from Heaven, and an apikorus. R’ Akiva says: Also one who reads external books, and one who whispers over a wound and says: “All the diseases which I have placed upon Egypt I shall not place upon you because I am HASHEM your healer”. Abba Shaul says: Also one who utters the Name according to its letters.