The supreme happiness of life is the conviction that we are loved; loved for ourselves — say rather, loved in spite of ourselves.

[Le suprême bonheur de la vie, c’est la conviction qu’on est aimé; aimé pour soi-même, disons mieux, aimé malgré soi-même.]

Victor Hugo (1802-1885) French writer

Les Misérables, Part 1 “Fantine,” Book 5 “The Descent,” ch. 4 (1.5.4) (1862) [tr. Wilbour (1862)]
    (Source)

(Source (French)). Alternate translations:

The supreme happiness of life is the conviction of being loved for yourself, or, more correctly speaking, loved in spite of yourself.
[tr. Wraxall (1862)]

The greatest happiness of life is the conviction that we are loved -- loved for ourselves, or rather, loved in spite of ourselves.
[E.g. (1873)]

The supreme happiness of life consists in the conviction that one is loved; loved for one's own sake -- let us say rather, loved in spite of one's self.
[tr. Hapgood (1887)]

The supreme happiness in life is the assurance of being loved; of being loved for oneself, even in spite of oneself.
[tr. Denny (1976)]

The supreme happiness of life is the conviction that we are loved; loved for ourselves -- say rather, loved in spite of ourselves.
[tr. Wilbour/Fahnestock/MacAfee (1987)]

The supreme happiness of life is the conviction that you are loved, loved for yourself, better still, loved despite yourself.
[tr. Donougher (2013)]