Verse 7
I will have mercy, etc. - See this explained, Mat 9:13.
There are four ways in which positive laws may cease to oblige.
First, by the natural law of necessity.
Secondly, by a particular law, which is superior.
Thirdly, by the law of charity and mercy.
Fourthly, by the dispensation and authority of the Lawgiver.
These cases are all exemplified from Mat 12:4-8.