If good is so obvious, then why does the bible tell us to be discernment between good and evil?
"As Jesus started on his way, a man ran up to him and fell on his knees before him. ‘Good teacher,' he asked, ‘what must I do to inherit eternal life?'
‘Why do you call me good?' Jesus answered. ‘No one is good—except God alone.' " - Mark 10:17-18
Before Jesus answered the rich young ruler about eternal life, He asked him "Why do you call me good?"
Is Jesus saying that he is not good? NO WAY
Jesus is the embodiment of what is good.
As bible teacher John Bevere explains, what Jesus meant in that is: we got a reference point for good and God has a reference point for good. Unfortunately, those 2 reference points are usually not the same.
You have to realize that Jesus is saying, "You have an idea of what's good, but God has a different idea."
It's all about the reference point.
"All Scripture is given by inspiration of God, and is profitable for doctrine, for reproof, for correction, for instruction in righteousness, that the man of God may be complete, thoroughly equipped for every good work." - 2 Tim 3:16-17
The apostle Paul is teaching us that if it's outside the word of God, be very careful and have a heart that can recognize if it's truly good for your lives. In the last days, people will call evil, good and good, evil.
If we are not firmly grounded in the word of God to know what God truly said is good for our lives, we can be duped, we can be deceived.
The enemy got Eve to turn on God not through evil, but by what was "good".
Remember, "There is a way that seems right to a man, but its end is the way of death." (Proverbs 14:12)