“What is the hardest task in the world? To think.”
“To endure oneself may be the hardest task in the universe.”
“The three hardest tasks in the world are neither physical feats nor intellectual achievements, but moral acts: to return love for hate, to include the excluded, and to say, "I was wrong.”
“To think is easy. To act is hard. But the hardest thing in the world is to act in accordance with your thinking.”
“You speak of Lord Byron and me; there is this great difference between us. He describes what he sees I describe what I imagine. Mine is the hardest task.”
“One of the hardest tasks as a human being is knowing when to keep an open mind, and when not to.”