Thought –We get worried about us being unintelligent or less intelligent, or of being a person of less memory power, while comparing ourselves with others. Please note, these are all God gifted qualities. The God restricts the intelligence of worldly people for certain reasons, best known to him/her. However, may be because too much intelligent people may cause more destruction, or if they are creative and gain knowledge extraordinarily then they may reveal the secrets of the God.
But it is observed, people of extraordinary- knowledge, intelligence, memory power of searching/inventive nature do not survive for long time period, as they go back or forced to go back after certain time period, from this earth after completion of their assigned works. Like Swami Vivekanand, Shankaracharya,Guru Govind Singh, Jesus Christ etc.
If I am wrong the God may forgive me because I am an innocent person.