Exegesis:
suniete (cf. 4.12) ‘you understand.’
Translation:
The same expression for understand should be used here as in verse 17. Otherwise the force of the statement is largely lost.
Quoted with permission from Bratcher, Robert G. and Nida, Eugene A. A Handbook on the Gospel of Mark. (UBS Handbook Series). New York: UBS, 1961. For this and other handbooks for translators see here .