be engraved on/in your heart/memory/mind

be engraved on/in your ˈheart/ˈmemory/ˈmind

be something that you will never forget because it affected you so strongly: Although he was very young at the time, the date of his father’s funeral was engraved on his heart.
Engrave means ‘cut words or designs on wood, stone, etc.’.
See also: engrave, heart, memory, mind, on