conscientious
adjective
governed by conscience; controlled by or done according to one's inner sense of what is right; principled.
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
Many librarians overconscientiously say, "No methods," but at the same time acknowledge the personal supervision and friendly interest that were meant in the query.
From Library Work with Children by Alice Isabel Hazeltine