Rather, “Again I will say.” The apostle repeats his exhortation, as if to forestall all objections about the impracticability of rejoicing amid unfavorable circumstances.

 The Lord is always the same (see on Mal. 3:6; Heb. 13:8; James 1:17). His love, His consideration, His power, are the same in times of affliction as in times of prosperity. Christ’s ability to give peace to the heart does not depend on external circumstances; so the heart that is centered on Him may constantly rejoice.

 See on ch. 3:1. Paul never tires of repeating that holy joy is one of the chief duties and privileges of the Christian.