[kidkosmic1]

"Why is He the Lamb slain from the foundation of the world...."

What is "the world" referred to here? When was it founded?

Here?

Genesis 1
31 Then God saw everything that He had made, and indeed it was very good.

At its foundation, the world was declared "very good" by God.

What world are we talking about? The fallen world, or the world God declared to be very good? Did God declare a wicked, evil, fallen world good? Of course not.

Galatians 1
4 Who gave himself for our sins, that he might deliver us from this present evil world, according to the will of God and our Father:

THIS PRESENT (current) EVIL WORLD.

[Frumanchu]

I've seen some blatant eisegesis in my time. That one ranks right up there.

Can't wait to hear your explanation of Eph 1:4, Rom 8:29-30, 1 Peter 1:20, 2 Tim 1:9, especially since the term "before the foundation of the world" is used, requiring (even under your twisting the meaning of "the world") God's foreknowledge.