Revelation 13:8 indicates God's plan of redemption, formulated before creation, was implemented from the foundation of the world. "From the foundation of the world" refers to a span of time, starting at creation, and extending through the present to the end of the age, with the specific timeframe in view being the end of the age. So what the verse literally says, is that the names of the lost were not entered at creation, and they were not entered at any time after creation unto the end of the age. Logically, if the period when the names were not entered is also the period when names were entered then the verse indicates the names of the saved were entered during the period from creation to the end of the age. However many folks draw the incorrect inference that the verse implies that all the names of the Elect were entered before creation. But as you can see, this is not what the verse actually says, and therefore the incorrect inference appears to be a wishful idea based on trying to pour doctrine into the text. Well, why not accept the incorrect implication? Because other verses suggest our names are entered when we become part of the body of Christ, part of the bride of Christ, part of the church. Hebrews 12:23 indicates the folks who are part of the general assembly, the church, are enrolled in heaven, so the inference from this verse indicates our names are entered when we are placed in Christ during our physical lifetime. The word translated "enrolled" is used to convey the idea of going somewhere and then signing in on a register, such as a census. You may object and say, but they may have been part of the church, so to speak, when they were elected before creation. No, that is not possible. 1 Peter 2:9-10 teaches we become part of God's people, the church, during our lives, because during our lives we were "once not a people" but became a people when we received mercy, when we were placed in Christ and our sins forgiven. This analysis of the issue also applies to Revelation 17:8, which again refers to names not entered and does not directly address when names are entered. But again the verse indicates names are not entered during the period from or since the foundation of the world or in other words since creation and therefore one can draw a reasonable inference that the names of the saved were entered during this same period. Final point, Ephesians 1:4 refers to being chosen in Him before the foundation of the world, or before creation. Since the names were not entered until the period after creation, God choosing Christ before creation is in view, and corporately all those Christ will redeem because you do not choose a Redeemer without the purpose of redemption. If the selection was of foreseen individuals, then our names would be entered before the foundation of the world, but contrary to this, our names appear to be entered after the foundation of the world.