“Unhappiness is selfish, grief is selfish. For whom are the tears?”

“The only selfish life is a timid one.”

“I don't want to eke out my life like a resource in short supply. The only selfish life is a timid one. To hold back, to withdraw, to keep the best in reserve, both overvalues the self, and undervalues what the self is.”

“Today, the sun is everywhere, and everything solid is nothing but its own shadow, I know that the real things in life, the things I remember, the things I turn over in my hands, are not houses, bank accounts, prizes or promotions. What I remember is love -- all love -- love of this dirt road, this sunrise, a day by the river, the stranger I met in a café. Myself, even, which is the hardest thing of all to love, because love and selfishness are not the same thing. It is easy to be selfish. It is hard to love who I am. No wonder I am surprised if you do.”

“There is no greater grief than to find no happiness, but happiness in what is past.”

“What are you that makes me feel thus? Who are you for whom time has no meaning?”

“In a vacuum all photons travel at the same speed. They slow down when travelling through air or water or glass. Photons of different energies are slowed down at different rates. If Tolstoy had known this, would he have recognised the terrible untruth at the beginning of Anna Karenina? 'All happy families are alike; every unhappy family is unhappy in its own particular way.' In fact it's the other way around. Happiness is a specific. Misery is a generalisation. People usually know exactly why they are happy. They very rarely know why they are miserable.”