I have no idea whether this is really necessary, and I hope it isn’t; but human ignorance continually surprises me. So:
Everything I say should be prefaced in your mind with “In my opinion”. I don’t have any claim to Revealed Truth. Anything I say is based on my own study, experience and discussion with others. My opinions are subject to change without notice as a result of new information, reconsideration, or a really convincing argument. I expect most of my opinions will change or at least become more nuanced as I get older. The only thing I’m sure of is just how little I know.
I don’t explicitly preface everything I say with “I think…”, or “In my opinion…” simply because it’s tedious and I expect people to be smart enough to realize that if it comes out of my mouth, it’s merely my opinion. If you think I’m telling you what to think, that’s nobody’s fault but yours.