Well, yes, the iota matters!

As you may no, the Arian controversy of the 4th century eventually came down to the question of whether Christ was "of like substance" or "consubstantial" (one in substance). The Greek words for each were only differentiated by a letter i, or iota, hence "not an IOTA of difference."

However, had Christ been just "of like substance," then something less than infinitely perfect would have been offered on Calvary. This would mean that Calvary wasn't really sufficient, and you can guess what would come after that! Thus, what words you use to describe permanent truths are important.

Keep this in mind as you read this.