Balanced in pleasure and pain, self-reliant, to whom a lump of earth, a rock and gold are alike, the same to loved and unloved, firm, the same in censure and in praise,
In plain words: Krishna says this person stays the same in pleasure and pain and relies on their inner self. To them a lump of dirt, a stone and gold are worth the same. They treat pleasant and unpleasant people alike, and they stay steady whether blamed or praised.