milk of human kindness

Translations
человеческая доброта
Despite his tough exterior, he’s full of the milk of human kindness.
Несмотря на его суровую внешность, он полон человеческой доброты.
Definitions
The phrase 'milk of human kindness' refers to natural compassion, gentleness, or benevolence that people show toward others. It suggests an innate tendency to be caring and sympathetic, often used to describe someone who is especially kind-hearted.