Adam Clarke

That I may know him - To be the true and promised Messiah, and experience all that salvation which he has bought by his blood. The power of his resurrection - In having this body of my humiliation raised from death, and made like unto his glorious body. This seems to be the sole meaning of the apostle; for it is in virtue of Christ's resurrection that we are to be raised incorruptible and immortal. And the fellowship of his sufferings - Christ died, not only as a victim for sin, but as a martyr to the truth. No creature can have fellowship with him in his vicarious sufferings; as a martyr to the truth, St. Paul wished to imitate him. Not only in the apostle, but in the primitive Christians generally, there seems to have been a strong desire after martyrdom.