he only thinks about
Il ne pense qu'à se perfectionner.
He thinks of nothing but improving himself.
— Les Sept Samouraïs (1954)
Le problème, c'est qu'il ne pense qu'à lui.
The problem is, he only thinks about himself.
He only thinks of himself.
He only thinks about that.
Il ne pense qu'à rouler le monde.
All he thinks about is pulling the wool over everyone's eyes.
— Shower (1999)
He only cares about himself.