“The hardest lesson that I learned is that “rejection is protection.””

“Is it important to be right or is it important to do what’s right? That’s one of the hardest lessons to learn.”

“The hardest-learned lesson: that people have only their kind of love to give, not our kind.”

“Maybe the hardest lesson Han had learned was that nobody is purely bad or good. Everybody seemed to be a mixture of both.”

“Yes I was burned but I called it a lesson learned. Mistake overturned so I call it a lesson learned. My soul has returned so I call it a lesson learned… another lesson learned”

“One of the hardest things for boys to learn is that a teacher is human. One of the hardest things for a teacher to learn is not to try and tell them.”

“The misery and suffering that abound everywhere, reveal clearly that you have wantonly rejected the lessons of life. Foolish man! Your repeated, wanton neglect to learn the lessons of centuries has wrecked your boasted civilisation upon the rocks of hatred and greed.”

“This is one of the hardest lessons for humans to learn. We cannot admit that things might be neither good nor evil, neither cruel nor kind, but simply callous – indifferent to all suffering, lacking all purpose.”

“But oppression by your Mock-Superiors well shaken off, the grand problem yet remains to solve: That of finding government by your Real-Superiors! Alas, how shall we ever learn the solution of that, benighted, bewildered, sniffing, sneering, godforgetting unfortunates as we are? It is a work for centuries; to be taught us by tribulations, confusions, insurrections, obstructions; who knows if not by conflagration and despair! It is a lesson inclusive of all other lessons; the hardest of all lessons to learn.”

“Perhaps the first lesson to be learned from biology is that there are lessons to be learned from biology.”