2 Corinthians 11:4
For if he that cometh preacheth another Jesus, whom we have not preached, or [if] ye receive another spirit, which ye have not received, or another gospel, which ye have not accepted, ye might well bear with [him].
Note 8 at 2Co 11:4: Once again, the context of this verse is very important to understand. Paul's teaching and authority had been questioned by those he called "false apostles" in 2Co 11:13. Previously he had countered their criticisms on a doctrinal level. Here, he was questioning his critics' character and accomplishments. Who were they or what had they done that Paul hadn't done? As he began to compare his resume with theirs, they came up on the "short end of the stick."
Note 9 at 2Co 11:4: Most of the translations interpret the phrase "ye might well bear with him" as meaning the Corinthians were entertaining these false apostles who were promoting these heresies. The New International Version translates this phrase as "you put up with it easily enough." Paul was saying that the Corinthians were so gullible that they allowed people to preach anything they wanted to, and they didn't counter it. That's not good.
Paul went on to say that they should consider the source. They should look at the lives of those who ministered to them and see the proper fruit before they embraced their doctrine. This is the exact point that the writer of Hebrews made in Heb 13:7. Paul then began to list some of his qualifications, which were inferior to no one.