In God being the First cause of sin into His World/ Creation, He by His Wisdom, deemed it essential for His Own Glory, and the accomplishment of His Eternal Purpose in Christ Jesus Eph 3:8-11 8 Unto me, who am less than the least of all saints, is this grace given, that I should preach among the Gentiles the unsearchable riches of Christ; 9 And to make all men see what is the fellowship of the mystery, which from the beginning of the world hath been hid in God, who created all things by Jesus Christ: 10 To the intent that now unto the principalities and powers in heavenly places might be known by the church the manifold wisdom of God, 11 According to the eternal purpose which he purposed in Christ Jesus our Lord: Even Christ desired and anticipated the Glory and Joy that was to follow His death of redemption for sin, for which He came into the world Heb 12:2 2 Looking unto Jesus the author and finisher of our faith; who for the joy that was set before him endured the cross, despising the shame, and is set down at the right hand of the throne of God. When was this Joy set before Him ? We believe before the foundation Prov 8:31 31 Rejoicing in the habitable part of his earth; and my delights/joy were with the sons of men. 1 Pet 1:11 11 Searching what, or what manner of time the Spirit of Christ which was in them did signify, when it testified beforehand the sufferings of Christ, and the glory that should follow. For these things were set before and appointed the Son of God in the Eternal Counsels before the world began, so it should be quite obvious the world began in order to accomplish the Eternal Purpose in Christ, and hence sin was essential to that Purpose !