heart of gold

1. A very kind and good nature, as in Bill is very generous; he has a heart of gold. This expression alludes to gold in the sense of “something valued for its goodness.” [Late 1500s]

Example Sentences

"The people here are absolutely brilliant, they're such lovely people and all of them have a heart of gold to do what they do."

From BBC

Rachel Daly: "Absolutely heartbreaking. A truly special man with a heart of gold. RIP Beardy."

From BBC

In a statement, Ms Weeks' sisters and mother described her as "an absolutely beautiful young lady with a heart of gold".

From BBC

Let’s start with the concurrence by Justice Amy Coney Barrett, who has been hailed in the press as a centrist moderate, or maybe a conservative with a heart of gold.

From Slate

We Americans love our literary losers, and who better to give us the latest version of a recluse with a heart of gold than Walter?

From Los Angeles Times