“aptitude”, “wisdom” and “understanding” all quoted material is from Google Dictionary (you simply type the word + definition into Google search: example: wisdom definition)
1. a natural ability to do something. "he had a remarkable aptitude for learning words"
2. archaic suitability or fitness. "aptitude of expression"
So aptitude means he was born with an ability to do this thing. Like a natural athlete has an aptitude for her sport.
noun: the quality of having experience, knowledge, and good judgment;
the quality of being wise.
synonyms: sagacity, intelligence, sense,
common sense, shrewdness, astuteness, smartness, judiciousness,
judgment, prudence, circumspection;
More the soundness of an action or decision with regard to the
application of experience, knowledge, and good judgment. "some
questioned the wisdom of building the dam so close to an active
volcano" synonyms: sagacity, intelligence, sense, common sense,
shrewdness, astuteness, smartness, judiciousness, judgment, prudence,
circumspection; More the body of knowledge and principles that
develops within a specified society or period.
plural noun: wisdoms "the traditional farming wisdom of India"
synonyms: knowledge, learning, erudition, sophistication, scholarship,
philosophy; lore "the wisdom of tradition"
This means learned smarts. We gain wisdom through experience.
1. the ability to understand something; comprehension. "foreign visitors with little understanding of English"
synonyms: comprehension, apprehension, grasp, mastery, appreciation,
assimilation, absorption; More
sympathetically aware of other people's feelings; tolerant and forgiving. "people expect their doctor to be understanding"
synonyms: compassionate, sympathetic, sensitive, considerate, tender,
kind, thoughtful, tolerant, patient, forbearing, lenient, merciful,
forgiving, humane; More
archaic having insight or good judgment.
Understanding means getting the information and being able to use it or explain it to another person so that they can explain it or use it.