It is said that to become great from good, you need some difficulties, which can help determine the difference between the ordinary and the extraordinary. True that he was heartbroken, and from an optimist, he went searching for lower stratas of life, when an illness to his father hampered his growth, as well as his family's ability to eat two square meals a day. Times made him look at life with displeasure and trauma.
Any good speaker has a tendency to be better read, more educated, and much more knowledgable than his audience. It is true even in case of Deepak, who has read thousands of motivational books, self-help books, biographies, spiritual awakening books among others. He has also followed plenty of audio speeches, including the famous ones from history, and the contemporary gold from his generation.