So you base your sense of morality on your own opinion. That's cool. That's all you had to say. I would be curious as to what formed your opinion though.
I cannot speak for Bruce but I know exactly where I have found it to be. At the precise point I do not want to surrender something and the Word is telling me I must. This is the ultimate conflict of the human soul and until I surrender the thing there is no peace. (peace with God ) This is where I decide to go on with God or come to a standstill. Because I'm not going one step further until that matter is dealt with.
The only other alternative is to say, I am not convinced that the Word of God is true, unaltered, infallible. I believe the truth needs to be "adjusted" to accomodate the times I am living in and the desires of my heart whatever they may be. I'm not only willing to deny Jesus before men ( His Word is Him ) but I'm approving those who will join me in the effort. At the end of the day I've become my own god.
In answer to the OP. I find if I am walking with God my conscience is very keen to right and wrong. If I am running from God my conscience could well be ignored and not too effective depending upon how long I've been ignoring it for.
The conscience can become seared and with that searing there is no longer anything to gauge right and wrong by other than what the Christian should gauge their right and wrong on - return to being led by the Holy Spirit AND the Word of God.
That is covered in Romans 1.
On the matter of morality, values, and knowing right from wrong? The Holy Spirit has dealt with me on matters others would be say, that isn't a sin! But it was for me because the LORD said, not to do it. The more a person obeys God the keener their conscience becomes. The more they will walk by the Spirit and not by the flesh.
The reverse is also true - leading to a complete blindness in which a counterfeit spirituality fills the vacuum completely. It is a dangerous place to be.
What about the atheist whose life is exemplary in every way? Gave to charities, did good works in 3rd world countries, gave huge donations - such as the Rockafellers have done perhaps?..... The very mention of their names - people reply - such a good family! Does God recognize any good work, any moral effort apart from Christ, any good word or deed done apart from Christ as anything more than something to be burnt up on judgment day? Not according to Him He doesn't. I will take Him at His Word because to do otherwise is simply irrational.