The ancient Greek philosopher Plato believed that people could only see the shadows of the artist who created all living things, including himself, the earth, the sky, the heavens, the underworld, and consider them to be the truth.
From this we can conclude that the great search for truth begins in these "shadows" and should not stop there, but move towards the original causality. In this sense, all tangible and intangible beings, as manifestations of the original causality, are the means leading to the first source.
Source used:
https://az.wikipedia.org/wiki/H%C9%99qiq%C9%99t