So it is with you, if you speak words [in an unknown tongue] that are not intelligible and clear, how will anyone understand what you are saying? You will be talking into the air [wasting your breath]!

and if Christ has not been raised, then our preaching is vain [useless, amounting to nothing], and your faith is also vain [imaginary, unfounded, devoid of value and benefit—not based on truth].

For Christ did not send me [as an apostle] to baptize, but [commissioned and empowered me] to preach the good news [of salvation]—not with clever and eloquent speech [as an orator], so that the cross of Christ would not be made ineffective [deprived of its saving power].