The Buddha said to investigate this body and the other foundations of mindfulness. There is nothing to solve or undo; we just need to know according to the truth.
Ajahn Cha
By "truth" Ajahn Cha is not referring to some philosophical principle, but the truth of the immediate moment - the experience we access when we are not trapped by our perceptions, our thoughts, our preconceived notions.
We can train to be aware of what is true by personally investigating the four foundations of mindfulness, outlined in the Satipatthana Sutta.
Sutta Summary:
www.consciousdynamics.com/course03/satipatthanaportal.html