This miracle caused a giant leap forward in our evolution. A brain without language is a confused stewpot of emotions, images, and instincts. Without any structure consistent from one individual to another. It was as if the brain was a clean unformatted hard drive. It had lots of storage space, but no consistent way to retrieve data, and no method of recording anything complex.
Language is the disk operating system of the brain.
It allows for consistent retrieval of data by structuring the way each bit of information is stored. It allows more than one individual to share complex information. It allows them to learn from each other. Faith is a commendable asset, only when it is based on truth. Bad faith is one based on a falsehood.