Every Christian book written on Freemasonry says this.
"These are some of the actual oaths a Mason must take: In the first degree of the Blue Lodge, "Binding myself under no less a penalty, than having my throat cut across, my tongue torn out from its roots and buried in the rough sands of the sea..." In the second degree, "Binding myself under no less a penalty, than that of having my left breast torn open, my heart plucked out and given as prey to the wild beasts of the field and the foul of the air..." In the third degree (Master Mason Degree), "Binding myself under no less a penalty, than that of having my body severed in twain, my bowels taken from thence and burned into ashes..."
For a Christian to go through this, you have to ask several questions: How can a follower of Jesus Christ, go to a Masonic Lodge, ask for membership, and say I am lost in darkness and I need the light of Freemasonry? If you read First John chapter One, it says, If you claim that you are lost in darkness the Light (of Jesus Christ) is not in you and you are living a lie.
Secondly: How can a Christian bow at an altar before a man that is called the Worshipful Master? Jesus said, You cannot serve two masters. There is only one Worshipful Master and that is Jesus Christ.
Lastly: How can a Christian take a pagan blood oath, swearing to have your throat cut from ear to ear, your heart given to the beasts of the field, your body cut in two and your bowels thrown into the sea? Those pagan blood oaths were forbidden by Jesus in Matthew chapter 5 and in the book of James."http://www.ao.net/~jmo/john/personal/masons.html