Definition of sweetness and light in English:

sweetness and light

phrase

  • 1Social or political harmony.

    ‘the relationship was by no means all sweetness and light’
    • ‘Underlying Arnoldian ideals of sweetness and light was a concern for social unity mingled with national pride.’
    1. 1.1 Good-natured benevolence.
      ‘when he's around she's all sweetness and light’

Origin

Taken from Swift and used with aesthetic or moral reference, first by Arnold in Culture and Anarchy (1869).