The completeness of Islaam1 obviously means that it cannot be completed further. Believing otherwise would imply one or more of the following dangerous conclusions:
This explains why Islaam warns strongly against introducing bid`ahs into the Deen. Imaam Maalik (r) said:
"Whoever innovates in Islaam what he believes to be a good bid`ah would be claiming that Muhammad has betrayed the trust (of delivering the full Message)..."
He then recited aayah 5:3 from al-Maa`idah2.