en_tn_condensed/1co/01/18.md

the message about the cross

"the preaching about the crucifixion" or "the message of Christ's dying on the cross"

is foolishness

"is senseless" or "is silly"

to those who are perishing

"dying." This refers to dying in rebellion against God.

it is the power of God

"it is God working powerfully in us"