As literature, the Bible contains writing styles and conventions that are common in most languages. One of those conventions is the use of figurative language, which makes the words in the Bible more diverse, expressive,
Figure of speech – “A figure of speech is a word or phrase that is used in a non-literal way to create a particular effect upon the reader/listener.”
This effect may be rhetorical as in the deliberate arrangement of words to achieve something poetic or prompt certain mental processes, or it may for descriptive purposes as in the use of language to suggest a visual picture or make an idea more vivid.
Figures of speech function as literary devices because of their expressive use of language. They use words in other ways than their literal meanings or typical manner of application.
Six Major Types of Figurative Language