Line-2Legge: The second line, dynamic, shows that with firm correctness there will be good fortune.
Wilhelm/Baynes: Perseverance brings good fortune.
Blofeld: Persistence in a righteous course brings good fortune.
Liu: Persistence brings good fortune. It (the second line) is in the center (the middle way).
Ritsema/Karcher: Trial: significant.
Shaughnessy: Determination is auspicious.
Cleary (1): Rectitude is auspicious.
Cleary (2): Correctness is auspicious.
Wu: Perseverance will bring auspiciousness.