Neither Muslims nor anyone else truly worships the true God if they reject Jesus as he really is in the Gospels.
John PiperAccording to the spirit of this age, the ultimate sin is no longer the failure to honor and thank God but the failure to esteem oneself. Self-abasement, not God-abasement, is the evil. And the cry of deliverance is not "O wretched man that I am, who will deliver me?" but "O worthy man that I am, would that I could only see it better"!
John PiperBeing infinite, God is inexhaustibly interesting. It is therefore impossible that God be boring.
John Piper