Matt 18:1-20

The little children remarks might be easily overlooked... but for the atomic bomb warning message in vs 6. "ummm millstone?...er sea?" The brutal reality is just this that God is Holy, not flexible. The World vs 7 is worthy of its coming destruction.
I won't be protracted about Vs 8 and 9... Sin will be dealt with severely by believers, because they don't really deal with it at all. God just won't tolerate it, so the true believers are the ones who DO deal with sin, because they are just obeying their master. I'm more literal with these two verses than many.
The vs 6 warning comes up again, in 10 this time with information about angels. Its hard to know exactly what the statement means. Context clues lend to concepts like 'guardian angels' but reading on, verses 12-14 seem to indicate God takes care of 'business' personally.
The remainder of the reading (to vs 20) is on confrontation and discipline. Its hard to practice right, and harder to take to heart as personal responsibility. But the standards for truth are no-negotiable, witnesses are required, and there is no death penalty, [understand the context] only (and this is severe, just differently severe) the shunning of the unrepentant.
The MDB gives good remarks on vs 20 which intern help with vs 18 & 19... These two are similar to what Jesus just said 'apparently' to Peter (really to the whole) in chapter 16 vs 19...