There is no absolute truth or absolute morality. Or, at least so far, no one has been able to present such a critter.
Morality is simply a religious concept and of not much use or value outside the small and limited viewpoint of a particular religious community.
Truth is another thing. There are things which can be proven to be true, for example, certain mathematical models, others which are true within a given set of conditions. But so far no one has been able to show the existence of any "Absolute Truth".
Even Kant's Categorical Imperatives are laid out in relative terms. Kant suggested that an Imperative was some action or inaction that would be required. However, what action or inaction is required will depend on what the relative circumstance is in reality of that moment.
While Kant's philosophy is useful for the trivialities of life, "If I am thirsty I must drink to satisfy my thirst", they fall apart when faced with anything more complex. As an example, when many are thirsty and there is insufficient fluids to meet even the minimal needs of the whole group.
Kant can't. Get it?
Right and wrong, not morality are the things of importance.
But...
what is right and what is wrong depends totally on what is known to the decisions maker about all of the conditions of the situation at that moment in time. In almost all cases, all of the information needed to make a right choice is not available, so decisions must be made on partial information, often in a split second, often in too short a period of time for full consideration. Almost always the best that can be done is try to make the best choice out of a range of known available options.
Reason is key. But unfortunately, reason is also limited to available knowledge and that, is relative.
Aslan is not a
Tame Lion