The first We knew of Him was Death — Abraham Lincoln

The first We knew of Him was Death-1
The second-was-Renown-
Except the first had justified
The second had not been.
(F.1006/J.1006)
[1] Him: Abraham Lincoln, and Jesus Christ.
[2] second: second life, the Resurrection; fame is one's second life, hinted by renown. Renown: of the Resurrection.
[3, 4] first had justified, second, not: His death had justified, but His second life, Resurrection, had not. The death of Abraham  Lincoln is known, and his fame is to be justified in the future.