This question already has an answer here:
In Avengers: Endgame, Hawkeye retrieves the soul stone, holding it in his hand (seemingly without difficulty). However, in previous movies, e.g., Guardians of the Galaxy volumes 1 and 2, it's an important plot point that Quill was only able to handle the power stone because of his heritage (i.e., he's a part lowercase-g god, not pure human).
Question: How is Hawkeye able to handle the soul stone?
I have two ideas, but I don't know if either of these are accurate:
Simply because he was wearing a glove (if I remember correctly). Although that seems like pittance compared to an infinity stone.
The soul stone has effectively "chosen" him because of the sacrifice of Black Widow. Another human in the same setting would be destroyed. The infinity stones have minds of their own.
Another possibility is that it's only the power stone that destroys humans on contact, but I don't think that's accurate, as it doesn't match Ego's explanation in Guardians of the Galaxy vol. 2.