Good or evil!
Evil is just a highly egoistic evolutionary strategy that harms other individuals.
Evil is just a biologically and socially conditioned response. It's nothing but a cloud of molecular interactions in your brain.
Existential good and evil only makes sense if there is a mind above us all.
There is no need to create any deity to understand what is good or evil. After that it can get more complicated, because what is altruistic to a group can be egoistic to others, so this model explains the world very well, much better than any fairy tales with "sin" involved.
We must embrace a perspective wholly unified in science and philosophy in order to maintain a healthy and balanced personality dedicated to serving a God of love, showing mercy and compassion for all fellow beings.
So how do you know what these absolute morals are?
My answer is by my own moral standards, based on empathy, reason and logic, situational judging what is the best moral decision.
So from here you can see what type of a person we are dealing with by their action.
And if you now say:
Why should your morals then be binding for me...?
They aren't, but if we disagree on anything, then we would have to discuss it, and either I convince you, or you convince me with arguments, or we have to find a compromise, or we go on disagreeing.
But just because you claim to have some sort of absolute objective morality, I will not just accept your opinion!
Morality has zero relevance or meaning absent moral agents e.g. humans, so thinking there's some universal or independent morality seems pointless.
Morality is more or less as we define it.
Some may claim that morality then becomes relative, and in a way it does, however, if its application is based on a reasoned framework and applied consistently in relevant contexts, then you can essentially have an objective morality IN the contexts that matter.
Of course, it depends on what moral principles we deem important and how we construct and apply whatever framework we choose to employ - Iow morality is as objective or as relative as we make it.
Ignorance always has to be factored into all things, be it individuals, societies, and political organizations.
Ideals are goals and will begin as personal expressions and then manifest in the rules and regulations albeit in a watered down, lowest common denominator fashion.
Moral principles and laws are derived from human motivations.
It begins with the individual and spreads through society, hopefully leading to a better world in which we can all live peacefully and enjoy abundant life.