Ellet J. Waggoner
The Cross is the demonstration of the power of God and of the inability of man.
The Cross is not just a singular event that happened about 2000 years ago. Revelation 13.8 "the Lamb was slain from the foundation of the world."
At creation God breathed out the breath of life into man; at the cross, Jesus breathed out His endless life that we might breathe it in.
“Therefore I say to you, every sin and blasphemy will be forgiven men, but the blasphemy against the Spirit will not be forgiven men. Anyone who speaks a word against the Son of Man, it will be forgiven him; but whoever speaks against the Holy Spirit, it will not be forgiven him, either in this age or in the age to come.
Matthew 12.31, 32
It is not enough to confess that Jesus Christ did come in the flesh; that will bring no salvation to anybody. We must confess from positive knowledge that Jesus is just now come in the flesh, and then we are of God. Christ came in the flesh eighteen hundred years ago, just for the purpose of demonstrating the possibility.