My interpretation: Caesar thinks that ordinary men when they see senators fall at his and beg for things, they may burn with fury thinking Caesar was treating his subjects as slaves and........( I don't know how to interpret the rest.)
These couchings and lowly courtesies
Might fire the blood ordinary men,
And turn pre-ordinance and first decree
into the law of children.
I think he means that ordinary men can be influenced by begging and pleading and might be persuaded to change their decisions, but not Ceasar.
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