But when he, the Spirit of truth, is come, he will teach  you all truth. For he shall not speak of himself; but what things soever he shall hear, he shall speak; and the things that are to come, he shall shew you.

And yet it has been asserted that,

human language is more adaptable to miscommunication than it is to communication. Including the writings of Popes, Saints, Fathers, and Doctors of the Church.

At present it seems safer to me to take a broad/"tolerant" view of what ideas/opinions are heretical and what are erroneous.

If St. Paul called the Church the "Pillar and ground of the truth," and yet if the Church is incapable of conveying this truth, through the instrument of human language, through St. Peter and his successors, then the promise of Christ is meaningless, as is the belief in the Church as the pillar and ground of the truth.

What other instrument did God create and bestow upon man, but human language, whereby He willed to have the knowledge of Himself imparted to the souls of men He wished to save from their sins and from all error?

It is BLASPHEMY for any person to assert that human language is an inadequate tool for the conveyance of truth, since it is God Himself who ordered the power of human speech to precisely this purpose. DID HE MAKE A MISTAKE?

And when they shall lead you and deliver you up, be not thoughtful beforehand what you shall speak; but whatsoever shall be given you in that hour, that speak ye. For it is not you that speak, but the Holy Ghost.

It is the Holy Ghost who spoke through the mouths of the holy martyr and apostles when they stood before kings and pharisees and tyrants. Is it not the Holy Ghost who speaks through the mouth of the Pope when he makes an ex cathedra pronouncement? Indeed it is, otherwise how could he be held to be infallible, or at least how could we not reduce the infallibility of St. Peter to a meaningless figure of speech, devoid of any tangible substance or effect? Do we say that when the Holy Ghost speaks, using created language (created for the very purpose of communicating God's truths to us), that we cannot discern His true meaning? God forbid!

Otherwise, how can you call ANYTHING heresy?

To those who make this assertion: Reconsider your rash, illogical and blasphemous position, while you yet have time.