C. F. Blumhardt
Nothing is more dangerous to the advancement of God's kingdom than religion. But this is what Christianity has become. Do you not know that it is possible to kill Christ with such Christianity? After all, what is more important - Christianity or Christ? And I'll say even more: we can kill Christ with the Bible! Which is greater: the Bible or Christ? Yes, we can even kill Christ with our prayers. When we approach God with our prayers full of self-love and self-satisfaction, when the aim of our prayers is to make our world great, our prayers are in vain.
Source: C.F.B, "Action in Waiting"