Before, effort and difficulty made them feel dumb, made them feel like giving up, but now, effort and difficulty, that's when their neurons are making new connections, stronger connections.
Avant ça, l'effort et la difficulté leur donnait l'impression d'être idiots, de vouloir laisser tomber à présent, l'effort et la difficulté, veulent dire des connexions entre neurones, des connexions plus fortes.