That is the friend who I sincerely esteem.
Not proper, because _who_, which is the object of the action expressed
by the transitive verb "esteem," is in the nominative case. It ought to
be _whom_, in the objective; and then it would be governed by esteem,
according to Rule 16. (Repeat the Rule:)--and, also, according to Rule
20. "That is the friend _whom_ I sincerely esteem."
They who much is given to, will have much to answer for.
From the character of those who you associate with, your own will be
estimated.
He is a man who I greatly respect.
Our benefactors and tutors are the persons who we ought to love, and
who we ought to be grateful to.
They who conscience and virtue support, may smile at the caprices of
fortune.
Who did you walk with?
Who did you see there?
Who did you give the book to?