Climax in rhetoric context is a figure of speech in in which words and phrases are arranged in order of increasing importance. It can also be used in parallel construction with an emphasis on the high point or culmination of an experience or series of events.
We see this being used in a lot of writings for example in an excerpt of ‘The ring of time’ by E.B White: “Out of its vivid disorder comes order; from its rank smell rises the good aroma of courage and daring; out of its preliminary shabbiness comes the final splendor. And buried in the familiar boasts of its advance agents lies the modesty of most of its people.” We also see people using this tool to emphasize their point in general speaking; “And from the crew of Apollo 8, we close with good night, good luck, a merry Christmas, and God bless all of you, all of you on the good earth.
Climax is a useful tool for people who really want to get a point across. who want to subtly point their focus towards one particular thing. It does not shift the focus to the idea forcefully, rather in its own way puts enough emphasize for the reader to get the main idea.