The phrase "deepest part" refers to the most profound or lowest point of something. It represents the furthest extent or the innermost point of a particular subject or object. Full definition
By blending the two concepts of nutrition and eating psychology you can begin to use food as a wonderful doorway into understanding deeper parts of yourself. (psychologyofeating.com)
Raw materials from deeper parts allow the local shop to sell better gear, and food can be used to recover between battles. (gameluster.com)
Part of dating is exploring whether a person is worth sharing deeper parts of. (petesgrillandpizza.com)