He was so confident in his legacy, he believed his name was written in stone.
Он был настолько уверен в своем наследии, что верил, что его имя вырезано на камне.
Definitions
This phrase means that something, such as a decision or a person's involvement, is permanent, unchangeable, or officially confirmed. If someone's name is written in stone, it implies that their role, position, or inclusion is fixed and cannot be altered.