If Extension were by nature divisible and an attribute of God, God would be divisible

Spinoza is aware that this will be received with great resistance. The possible objection he imagines is that since Extension is divisible by its very nature then, if Extension were an attribute of God, God would be divisible. God, of course, cannot be divisible, for then he would not be infinite. In the Scholium to 1P15 he shows the ensuing contradictions if one holds Extension to be by its very nature divisible. It is important for him to show that Extension cannot imply divisibility in answer