A Christian believes any 'thing', even dimensions, are caused to exist by The Creator, and that is a part of the definition of The Creator, The One Who IS before anything made was made, and The One Who IS after everything made is ended. We take the Word of I AM, Who defined Himself as Alpha and Omega. ... And that irks the willful deniers that they cannot get Christians to buy into their circular reasoning. But then faith is like that, foolishness to them who are perishing.
Man is not the measure of God.
Thank you for sharing your insights!
Christians are those who believe God and have chosen to value the same things He does. Being a Christian does not require that one believe God created dimensions, or that man can define the creator, or His creation, or any elements of that creation. God is a sentient rational being, who created man in His image and likeness, as per the parable of Genesis. Any sentient rational being that exists, must be composed of energy to provide for the functions that being is capable of. That means, it must exist within the dimensions of their world.
Dimensions, are simply quantitative elements of spacetime, which is in fact energy. In order for any being to exist, they must be composed of energy which provides for the machinery that provides the functions of sentience and rationality. If there is no energy to provide for those functions, there is nothing. Man can not define nothing to then be some spirit in a void and call it god, because the relevant definition of void is nothing and there is absolutely no energy in it to provide for the functions of a sentient rational being, or for the creation function. The real void is energy and it has dimensions. Any world must be composed of energy and have dimensions, at least one of which is time.