According to Brahmins, for being intelligent and knowledgeable, you need to study science and purify your mind... And when your mind get purified you

Start following sanatan dhrama, and when you too much purified you turn out to be most upper caste human that are only Brahmins...
Brahmins mind is most pure but they hate God and humanity... And when you hate God and humanity, you no longer look like beautiful human beings and convert to alien...