“there are no eternal facts as there are no absolute truths.”
This is a famous quote by Nietzsche and I am tempted to give my opinion about it, but I don’t. The reason I don’t like to that is complicated, but I can give an example that might explain it. If someone ask me what I think of a piece of music from for instance Mozart, I can tell them if I like it or not, but I cannot be critical about the quality of the music because that would mean that I think that I am at the same level as a Mozart. Only if I studied classical music, composition and so on, I can begin to understand Mozart’s quality’s and I can start thinking about giving a critique.
The same goes for a quote from a famous philosopher. I cannot critic it because I don’t know how it is connected with the rest of the philosopher’s work. If I have an opinion about it, I must be honest and admit that that opinion is based on that of another philosophers work with a similar status than the one that I am commenting on. The same goes for agreeing to, do you really know what you are agreeing with?
An opinion is surrounded by pitfalls, watch your step.