Swiftly taking on the mantle of Britain’s monarch, King Charles III returned to London from Scotland on Friday, a day after the death of Queen Elizabeth II, to pledge that he would serve the British people, "with loyalty, respect and love, as I have throughout my life.”

The king’s speech capped a day of mourning across Britain, but it was also a vivid demonstration of continuity in this constitutional monarchy. He met with new Prime Minister Liz Truss just four days after the queen anointed her at Balmoral Castle, in the last official act of her seven-decade reign.

"Queen Elizabeth was a life well lived, a promise with destiny kept,” Charles said in a televised address that was at once dignified and deeply emotional, a son’s grieving eulogy for his mother and a sovereign’s solemn oath of duty.