Bottled gas or the air we breathe?

Some people admit that it might be nice to have the children in a Christian atmosphere but ...

'How can you be specifically Christian when you teach the children that two times two are four?' Well, our answer is that if you cannot teach arithmetic to the glory of God, you cannot do it any other way because it cannot be done any other way by anybody. And by this I do not mean that you have breathed in a sort of Christian atmosphere about the problems of arithmetic in the sense that you have opened the school session with prayer a couple of hours before. By a Christian atmosphere I mean first of all that deep conviction on the part of the teacher that no fact is teachable except when brought into relationship with God. 

(Foundations of Christian Education: Addresses to Christian Teachers (Christian perspectives) Ch 1, Antithesis in Education, p18.