Acknowledging unhappiness is the ultimate proof of love
In the first legend of the Grail -- a miraculous stone which has the virtue of a consecrated wafer that sates all hunger -- it is said that the Grail belongs to the first person to ask the stone's gardian, a king almost completely paralysed by a painful wound, "What is your torment?".
The fullness of love for your neighbor, is simply being capable of asking them "What torments you?". It's knowing that the malheureux exists, not as one of many, not as an example of a social category labeled malheureux, but as a man, exactly like us, who was struck one day and marked by the inimitable mark of malheur. To do this it is sufficient, but indispensable, to know to cast a certain gaze upon him.
This gaze is first an attentive gaze, where the soul empties itself of all its own content in order to receive in itself the being who it looks at as he is, in all his truth. This can only be done by those capable of attention.