What is the correct subject form in, "He who runs, runs faster"?

In the phrase "He who runs, runs faster," the correct subject form is "who." This is because "who" is used as the subject pronoun in a clause that provides more information about "he." The phrase "he who runs" indicates that we are referring to the "he" specifically in the context of running.

The use of "who" is appropriate here since it introduces a relative clause that modifies the subject. In contrast, "whom" is typically used in object positions, "which" refers to objects or animals, and "whose" indicates possession. Therefore, "who" effectively serves its grammatical role as the subject in this context, making it the correct choice.