Tout amour qui dépend d'une chose passagère —une fois la chose passée, l'amour passe; et (tout amour) qui ne dépend pas d'une chose passagère [comme l'amour des tsadikim et des sages] ne passe jamais. Qu'est-ce que l'amour qui dépend d'une chose passagère? Le niveau d'Amnon et Tamar, [Amnon aimant Tamar à cause de sa beauté]. Et (qu'est-ce que l'amour) qui ne dépend pas d'une chose passagère? L'amour de David et Jonathan [pour accomplir la volonté de leur Maître. Jonathan a dit à David (I Samuel 23:17): "Tu es le roi d'Israël et je serai ton vice-roi."]
Bartenura
Any love that is dependent on something transient: that does not last. When the thing that was the cause for that love perishes, the love will also perish. But any love that is not dependent on something transient, but rather on something lasting - for example, the love of the righteous men and the sages - never perishes. In the same way that the thing which is the cause of that love does not perish, so [too] does the love not perish.
The explanation of these words is like this: You know that if the physical causes are negated and removed, then it will be necessary that what they cause will be removed with the removal of its cause. And because of this, when the cause of the love is a divine matter - and that is the true science - it is impossible for that love to be removed ever, as its cause is eternally in existence.