“Maybe the more emotions a person experiences in their daily lives, the longer time seems to feel to them. As you get older, you experience fewer new things, and so time seems to go by faster.”

“You love everything don't ya, but ya know what, as you get older, the things you love so much might not seem so special anymore. Like your jack-in-the-box, maybe you'll realize it's just a piece of tin and a stuffed animal. The older you get, the fewer things you really love. By the time you're my age maybe it's only one or two things, actually it might only be one.”

“My house fly theory is related to my theory about why time seems to go faster as you get older.""Why's that?" the girl asked."It's proportional," Leonard explained. "When you're five, you've only been alive a couple thousand days. But by the time you're fifty, you've lived around twenty thousand days. So a day when you're five seems longer because it's a greater percentage of the whole.”

“One of the seats of emotion and memory in the brain is the amygdala, he explained. When something threatens your life, this area seems to kick into overdrive, recording every last detail of the experience. The more detailed the memory, the longer the moment seems to last. "This explains why we think that time speeds up when we grow older," Eagleman said--why childhood summers seem to go on forever, while old age slips by while we’re dozing. The more familiar the world becomes, the less information your brain writes down, and the more quickly time seems to pass.”

“Everything was new, now I’m a junkie, I seem to need more severe doses of experience to feel anything.”

“A baby has brains, but it doesn't know much. Experience is the only thing that brings knowledge, and the longer you are on earth the more experience you are sure to get.”