A mistranslation. Rev., kept him safe. Peculiar to Mark. Compare Mat 9:17, are preserved; Luk 2:19, kept ; σύν, closely; τηρεῖν, to preserve or keep, as the result of guarding. See on Joh 17:12, and reserved, 1Pe 1:4.
Did many things (πολλὰ ἐποίει)
The proper reading, however ἠπόρει; from ἀ, not, and πόρος, a passage. Hence, strictly, to be in circumstances where one cannot find a way out. So Rev., rightly, he was much perplexed. The other reading is meaningless.