Commentaries:
As the elect of God, we must put on or clothe ourselves with longsuffering. By doing this in unity as a church, we rid ourselves of, or at least dramatically reduce, friction. To be loving and effective, a minister must correct, rebuke, and encourage with longsuffering.
Martin G. Collins
Longsuffering
Paul had himself found Timothy, taking him with him in his travels. In a way, Timothy had grown up under the wing of the apostle Paul. So, when he says that Timothy had followed his manner of life and doctrine, he really had for quite a while. He was Paul's protégé. He is warning him: "You've seen what I've gone through, and you are following in my footsteps. You're going to face these things too—not only the good things, but also the bad. This is just part and parcel of the job."
Richard T. Ritenbaugh
Itching Ears