do (something) out of the goodness of (one's) heart
To perform some task because of one's altruistic generosity or goodwill, without personal or ulterior motivations. Often used in negative constructions. You expect me to believe you would do this out of the goodness of your heart? Come on, what are you looking for in return? I'm not helping you with all these different jobs out of the goodness of my heart. I fully expect to be paid for my time. Please, no lawyer just does something out of the goodness of his heart. Don't be surprised when he bills you for this.
do (something) out of the kindness of (one's) heart
To perform some task because of one's altruistic generosity or goodwill, without personal or ulterior motivations. Often used in negative constructions. You expect me to believe you would do this out of the kindness of your heart? Come on, what are you looking for in return? I'm not helping you with all these different jobs out of the kindness of my heart. I fully expect to be paid for my time. Please, no lawyer just does something out of the kindness of his heart. Don't be surprised when he bills you for this.
Farlex Dictionary of Idioms. © 2024 Farlex, Inc, all rights reserved.