Humility is not thinking less of ourselves than we truly are. Humility is not like a weak, limp, and malnourished plant; a half-picture of what it is supposed to be.
Neither is humility thinking more of ourselves than we truly are. Humility is not like a chihuahua seeing itself as a pit bull.
Furthermore, humility is not falsely portraying ourselves as less than we are so that others will think more highly of us than we truly are. That is false advertising, or false humility.
Humility is being in right relationship with our Creator and everything else. Humility means knowing who we are and who we are not, and living accordingly.
“Humility consists in a realistic opinion of yourself.”
 Jeremy Taylor, “The Grace of Humility,” in Devotional Classics, 244.