Bism Allah Alrahman Alrahem
Proud against Humble
The first one who committed sin was Iblis (Satan) and his sin was due to proud feeling against Adam!
Humble is part of gratitude to Allah for his blessing to the people. No one at all is able to count the blessing of Allah that He gave us on this planet for free of charge except His worship which is again for our own benefits.
If you got good brain and high IQ plus good health you should be thankful to Allah and never be proud feeling. Your health and brain is only temporary which will finish soon. It is the Satan who makes you to feel proud over the others when you achieve something. Whatever you achieve it will end and they only thing that you leave behind you is your good deed or bad deed. In fact you will take your deeds with you and you will be accounted for them including the feeling of proudness.
Allah is the only one who is Great and the Proudness is for Him alone so anyone who want to take that feature will challenge Allah so then become among the losers. If you feel humble and thankful to Allah then He will gives you more and more (read the Holy Quran to see why and how?).
لَئِن شَكَرْتُمْ لَأَزِيدَنَّكُمْ. وَلَئِن كَفَرْتُمْ إِنَّ عَذَابِي لَشَدِيدٌ
If ye are grateful, I will add more (favours) unto you; But if ye show ingratitude, truly My punishment is terrible indeed (The Holy Quran: 14: 7)