Psalm 120:6-7, My soul hath long dwelt with him that hateth peace. I am for peace: but when I speak, they are for war.

1 John 4:4-6 & 13, Ye are of God, little children, and have overcome them: because greater is he that is in you, than he that is in the world. They are of the world: therefore speak they of the world, and the world heareth them. We are of God: he that knoweth God heareth us; he that is not of God heareth not us. Hereby know we the spirit of truth, and the spirit of error….Hereby know we that we dwell in him, and he in us, because he hath given us of his Spirit.

We can have an optimistic/postmillennial eschatology, so long as we allow it to organically flow from and bend before Scripture: even with an optimistic/postmillennial eschatology, we must never forget the antithetical relationship between Christ and his enemies, between the Church and the world. Thus, we must always remember, not in spite of, but because of our optimistic/postmillennial eschatology, that we are separated unto God by the Holy Spirit!