Matthew Poole and continuators on Acts 9:22

22 But Saul increased the more in strength, and confounded the Jews which dwelt at Damascus , proving that this is very Christ.

True grace thrives by exercise and opposition: The word here used, many take to be a Metaphor from builders, who in erecting their Fabricks, fit one piece or part to another, and then bring them, and joyn them together; thus St. Paul did, in bringing forth, or quoting the promises in the Old Testament, and shewing their exactly being fulfilled in the New Testament, or in the Gospel of our Saviour Jesus Christ; and he spake with such an evidence and demonstration of the Spirit, that he did as 'twere constrain men to be of his opinion:

Which was the sum of the Gospel.