1. The principles and moral values are flexible, according to personal and cultural criteria.
2. Resistance to change is a natural tendency of the human being.
3. Extraordinary results require enormous efforts.
4. People always must be optimistic (no matter what happens).
5. As human intelligence and creativity have no limits, personal improvement is an endless process. Therefore, it is necessary to make small investments to be continuously updated and no one can claim that there is nothing left to learn.
Although self-help has advantages and disadvantages (exposed in biased radical opinions), the richness of some self-help books confirms the innate capacity of people to explore new frontiers, and contribute to the progress and development of humankind.
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