I offer my heartfelt congratulations and best wishes to you both.
My heartfelt sympathy is extended to the family circle.
Please accept our heartfelt gratitude for your financial support over the last sixteen months.
A handwritten note will usually suffice for a heartfelt thank you.
Whether you write a rhyming prayer, a prayer dotted with lots of uses of "thee" and "thou", or a prayer that reads like you're talking to your best friend, with a little brainstorming you can write your own heartfelt Christmas prayer.