Sechel, one can and should enjoy this world to an extent, in order for it to be an assistance to him lefakayach daato, as the tanya writes about one who eats בשרא שמינא דתורא in order to have a clear head for learning. We have a guf and we learn better when that guf is taken care of. But it’s obviously not something to do all the time… avoidance of pleasures is something that is mentioned in the rambams shvil hazahav; one cannot be turned towards materialism, but neither should he go into asceticism.
Then there’s torah mitoch hadchak, which is another madrega.