Morals & Dogma pgs 104-105

Masonry, like all the religions, all Mysteries, Hermetiscism, and Alchemy, conceals its secrets from all except the Adepts and Sages, or the Elect, and uses false explanations and misinterpretations of it's symbols to mislead those who deserve to be mislead; to conceal the Truth, which it calls Light, from them, and to draw them away from it. Truth is not for those who are unworthy or unable to receive it, or would pervert it. So God Himself incapacitates many men, by color-blindness, to distinguish colors, and leads the masses away from the highest Truth, giving them the power to attain only so much of it as it is profitable to them to know. Every age has had a religion suited to its capacity.
The Teachers, even of Christianity, are, in general, the most ignorant of the true meaning of that which they teach. There is no book of which so little is known as the Bible. To most who read it, it is as incomprehensible as the Sohar*.
So Masonry jealously conceals its secrets, and intentionally leads conceited interpreters astray.   (Morals and Dogma Pages 104-105)