touchstone

they tend to regard grammar as the touchstone of all language performance.

success, a touchstone of opportunity, ambition, and ability;

A man’s deed is the touchstone of his greatness or littleness.

Honesty is the touchstone of a good relationship.

Integrity is considered the touchstone of a trustworthy person.

Her actions served as a touchstone for his own decisions.

The company's commitment to quality is the touchstone of its success.

For many, education is seen as a touchstone for success.

His ability to adapt quickly became the touchstone of his leadership style.

In literature, Shakespeare's works are often considered the touchstone of classic writing.

The touchstone of a good friendship is mutual respect.

His generosity towards others is the touchstone of his character.

The ability to listen is a touchstone of effective communication.