Again (as in 1 Corinthians 7:29b), Paul’s instructions should not be understood too literally. He is not advocating a stoic life, devoid of feelings and desires. Rather, he is reminding the Corinthians that the sorrows, joys, and possessions of this world are not of ultimate concern.
30 ceux qui pleurent comme ne pleurant pas, ceux qui se réjouissent comme ne se réjouissant pas, ceux qui achètent comme ne possédant pas,