6. παιδεύει. This blessedness of being “trained by God” (“Blessed is the man whom thou chastenest, O Lord, and teachest him out of thy law,” Psa 94:12) is found in many parts of Scripture. “As many as I love, I test (ἐλέγχω) and train” (παιδεύω), Rev 3:19; Psa 119:75; Jam 1:12.
μαστιγοῖ δὲ κ.τ.λ. The writer follows the reading of the LXX., by a slight change in the vowel-points, for “even as a father to a son He is good to him.”