Who said "My dear fellow, the truth isn't quite that flexible."?

This quote is attributed to Basil Hallward.

My dear fellow, the truth isn't quite that flexible. - Basil Hallward

"My dear fellow, the truth isn't quite that flexible."

Basil Hallward Truth

Character in The Picture of Dorian Gray

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"Sin is a thing that writes itself across a man's face."

"I hope I shall grow old gracefully."

"Dorian, from the moment I met you, your personality had the most extraordinary influence over me."

"To make oneself perfect is the aim of us all."

"Lucy, you got some 'splainin' to do!"

"You must always be honest with the people you love."

"Truth always comes out in the end."

"Honesty is always the best policy."