Khayyâm was a Persian astronomer-poet and free-thinker. From his Rubáiyát:
And do you think that unto such as you
A maggot-minded, starved, fanatic crew
God gave a secret, and denied it me?
Well, well—what matters it? Believe that, too!
More on Khayyâm here. Related: My article No Reformation for Islam, Please, on why Islam needs reforming but not a Reformation.