Being smart is not an option, either you are or you are not. Genes, early stimuly, proper education and nutrition from a young age sets intelligence in stone. 

Being kind and patient on the other hand can be cultivated.  

 You don’t think you can increase your intelligence? What about neuroplasticity? 

 Indeed, one can increase knowledge and experience but IQ seems to only go down after the age of 22-24. 

The only thing that helps with brain function is physical exercise. But it only slows down the decay.