Absolute reality = truth = fact is that which exists independent from observation and experience.
Absolute reality is that with exists objectively whether or not we are aware of it and believe it. Absolute reality exists totally seperate from anyone's capacity to observe, measure, define and/or believe it. It exists independent from any source or origin.
Philosophy is a methodology developed to contemplate the nature of absolute truth and incrementally improve our understanding thereof by first making hypotheses and validating those hypotheses with thought experiments applied to our subjective experience.
The scientific method is a refinement of philosophical methodology replacing thought experiments with empirical data and eliminating logical fallacies, making the validation mechanism far more reliable and therewith significantly reducing error.
The scientific method is thus a methodology that gradually reveals objective reality with increasing detail and accuracy and therewith also allows us see the interconnection between the different elements and attributes of objective reality that in turn helps us manipulating objective reality to our advantage. It allows us to understand how we can find happiness and safety and build the tools to fulfill them.
As a refinement of philosophical methodology, it's also worth pointing out that the scientific method is capable of adressing every issue philosophy deals with with greater accuracy and detail.
Questions the scientific method cannot answer with any degree of certainty or accuracy whatsoever are therefor also questions philosophy cannot answer with any degree of certainty or accuracy whatsoever. Abandoning the scientific method to answer questions it cannot answer at this point in time and looking for an answer in philosophy instead is therefore utterly pointless.
The vast majority of things that were mysteries to our ancestors have already conslusively been answered by science and science alone. Wherever mysteries remain, science is indefinitely the most reliable methodology to answer it. The belief that any mystery left unsolved by science can be solved or has been solved by any other means is nothing but wishful thinking and a naive response to fear of the unknown.
What about ethics?
Science both teach us a lot about how our actions influence our happiness and stability. Herein, neuropsychology typically focuses on individual behavior, whereas sociology focuses on the collective components components and biology focuses on genetic components of our behavior.
Combined, neuropsychology, sociology and biology give a rather complete picture of human behavior and human consciousness. It allows us to model human nature in a consistent way, which in turn allows us to develop a rational moral foundation based this model.
Adding to that, mathematical studies like game theory can help us determine the impact of our actions and assess that impact with greater clarity.