Adam Clarke on 2 Corinthians 4:13

We having the same spirit of faith - As David had when he wrote Psa 116:10 : I believed, therefore have I spoken: we also believe that we shall receive the fulfillment of all God's promises; and being fully convinced of the truth of the Christian religion, we speak and testify that our deliverance is from God; and that he does not fail those who trust in him, and that he saves to the uttermost them who come unto him through Christ Jesus.