On this Rock will I build my Assembly, and the
gates of Hadēs shall not prevail against it. Matthew 16:18
Leaving aside the meaning of the word ecclesia, or “assembly,” we note that the word rendered “prevail” over; to overcome and vanquish. It occurs elsewhere only in Luke 23:23, where “the voices of them prevailed, and Pilate gave sentence that it should be as they desired.” They “prevailed” against Pilate, but neither they nor the grave could prevail against Christ – He rose again from Hadēs, or the grave. He gained the victory over death and Hadēs, and His Assembly will be conquerors too.
They will one day shout, O Hadēs, where is thy victory …Thanks be to God which giveth us the victory through Jesus Christ our Lord (I Corinthians 15:55-57).
This victory will be in resurrection, and resurrection will be the great and abiding proof that Hadēs will not prevail against “the dead in Christ,” even as it prevailed not against Him.
From “Sheol and Hades: Their Meaning and Usage in the Word of God” by E. W. Bullinger