Orthodoxy, or right opinion, is, at best, a very slender part of religion. Though right tempers cannot subsist without right opinions, yet right opinions may subsist without right tempers. There may be a right opinion of God without either love or one right temper toward Him. Satan is a proof of this.
A. W. Tozer quoted Wesley (dunno if it’s Charles or John) in the preface of his book, the Pursuit of God, to communicate the fact that one may claim to have the knowledge of God, yet not know His presence. This reminds me of James 2:19 (“You believe that there is one God. Good! Even the demons believe that—and shudder.”), where James talked about how faith must be accompanied by works, lest we are like demons who believe that there is one God and fear Him, yet remain demons still.
I can’t help but ask myself as well, do I just have a right opinion of God, or do I truly know Him personally? This would have to be tested and proven in my everyday activities then. I don’t want to be presumptuous to answer the question now.