I too hold some very, very strong opinions and beliefs. But for me to raise that opinion/belief to the level of conviction I would have to say that I hold that opinion/belief due to the Illuminating ministry of the Holy Spirit, and by claiming so I am, in effect, saying "In this I am right because God is on my side."And if someone doesn't want to call it a conviction, it is a very, very, very strongly held belief/opinion.
God is not on my side. I am, as much as humanly possible, on His side.