Processes and Efforts used by Sages are also Scientific (without involving Tangible phenomenon)
Sages know Truths via Introspection ; their choice for Righteousness gives them access to Eternal and Rhema Truths.
When there were no Texts, Traditions, accumulated Knowledge and University, it was Experience, cause Effect Phenomenon, quests, spiritual research, meditation and introspection that was used to Derive and Understand Truths .
Spiritual face; art depict
Anantadrishti: of Infinite vision
Sages would commence their Knowing of God ( Righteous energy) chiefly by Establishing via Meditation , the Qualities of Righteousness and their Trusted Source ( that enables Him to be called God, trusted and ascribed Devotion to).
Instincts and Ideology would describe the Guiding factors in this.
.......
http://themeswithcontentintro.blogspot.com/2023/03/spirituality-as-process-and-result-for.html