Playful blushes, that seemed nought
But luminous escapes of thought. [ Moore ]

The mind is playful when unburdened.

The morn is up again, the dewy morn,
With breath all incense, and with cheek all bloom,
Laughing the clouds away with playful scorn,
And living as if earth contain'd no tomb, -
And glowing into day. [ Byron ]

Nothing's more playful than a young cat, nor more grave than the old one. [ Proverb ]

Sorrowful words become the sorrowful; angry words suit the passionate; light words a playful expression; serious words suit the grave. [ Horace ]