Note 21 at 2 Tim. 2:11: Remember that in context, Paul is exhorting Timothy to faithfulness in the face of hardships (see note 11 at v. 3, p. 1322). He is basically saying that whatever we suffer for the sake of Christ will be worth it because of the reward we will receive.

When we die to ourselves (see ref.b at this v.), we experience what true life in Christ is (v. 11). We may suffer now, but there is coming a time when we will reign with Christ throughout all eternity (v. 12). God is so good that even when we fail, He remains faithful to us (v. 13). But there is a warning that if we reject Him, He will reject us (v. 12).

All of this is to motivate Timothy towards faithfulness.

Note 22 at 2 Tim. 2:11: Paul uses a series of opposites to put in perspective our hardships. If we die we live (v. 11). If we suffer we reign (v. 12). If we falter in our faith, God never will (v. 13). The rewards are greater than the sacrifices. We can't lose for winning.

Note 23 at 2 Tim. 2:11: Some scholars interpret this as speaking of physical death through martyrdom and a promise of a physical resurrection. Others see this in the sense of dying to self and experiencing the abundant life of Christ. Both of these interpretations have merit and are scripturally accurate.