Aisthanoma means to perceive, comprehend, or understand — particularly through the senses or intuitive awareness. Appearing only once in the NT (Luke 9:45), it refers to understanding that comes through more than intellectual cognition — a whole-person grasping of reality. The noun aisthēsis (perception, discernment) appears in Philippians 1:9. The related word aisthētērion (faculty of perception) is used in Hebrews 5:14.
Biblical knowing is never merely cerebral — it involves aisthēsis, a trained, holistic perception. Hebrews 5:14 says "solid food is for the mature, who by constant use have trained their faculties (aisthētēria) to distinguish good from evil." This suggests that spiritual discernment is a skill developed through practice, not just inherited or instantly given. Paul's prayer in Philippians 1:9 that love would "abound more and more in knowledge and depth of insight" (aisthēsei) connects love with trained perception — seeing reality as God sees it.