From Wikipedia a truism is a claim that is so obvious or self-evident as to be hardly worth mentioning, except as a reminder or as a rhetorical or literary device.

In philosophy, a sentence which asserts incomplete truth conditions for a proposition may be regarded as a truism. An example of such a sentence would be: "Under appropriate conditions, the sun rises." Without contextual support — a statement of what those appropriate conditions are — the sentence is true but uncontestable. A statement which is true by definition ("All cats are mammals.") would also be considered a truism.

The word may be used to disguise the fact that a proposition is really just an opinion, especially in rhetoric.

My point you ask? Herein lay my opinions which are likely obvious to everyone else. Perhaps at best this make me a prophet of the bleeding obvious.