Conscious yet alien, devoured by passion yet disinterested, Mersault realized that his life and his fate were completed here and that henceforth all his efforts would be to submit to this happiness and to confront its terrible truth.
The uxtapostion shows his unintelligence- happiness in life comes from a ignorance or intelligence
"Unintelligence is gained" shows how this simple/repetitive life has made Mersault happy over time
