Jesus never rests.
- Francis J. Moloney, The Gospel of Mark: A Commentary, p. 51

A passion narrative with extended introduction.
- M. Kahler (he may have meant all four gospels, rather than just Mark)

Mark's story of Jesus is action oriented.
-- D. A. Carons & Doglas J. Moo, An Introduction to the New Testament, 2nd ed. p. 169

To paraphrase Pogo, we have found the Sitz im Leben for mark, and it is us.
-- John P. Keenan, The Gospel of Mark: A Mahayana Reading, Orbis 1995, p. 21.

This also the elder (John) used to say. When Mark became Peter's interpreter (hermeneutes), he wrote down accurately, though by no means in order (taxei), as much as he remembered (emnemoneusen)of the words and deeds of the Lord; for he had neither heard the Lord nor been in his company, but subsequently joined Peter as I said. Now Peter did not intend to give a complete exposition (suntaxin) of the Lord's ministry but delivered his instructions to meet the needs (chreiae) of the moment. It follows, then, that mark was guilty of no blunder if he wrote, simply to the best of his recollection (apemnemonesen), an incomplete account.
- Eusebius, Ecclesiastical History 3.39.15 quoted by Moloney, The Gospel of Mark, p. 51

...Mark presents Jesus as one who must cast the truth like a stone through a plate glass window.
-- Ben Witherington, The Gospel of Mark, p. 60