“Polycarp replied to Marcion, who met him on one occasion, and said, "Do you know me?" "I do know thee, first-born of Satan." Such was the horror of the apostles and their disciples had against holding even verbal communication with any corrupters of the truth.”

“Do you even know who the enemy is?"
"I think… it's me".”

“Do not know the truth by the men, but know the truth, and then you will know who are truthful.”

“"How much do you know?" she said. "Do you know that dreams are illusion?"
"Of course I do," I said. "Every one knows that."
"Oh no they don't," she said, "the mad don't know it."
"That is true," I said.
"And do you know," she said, "that Life is illusion?"”

“Do you know the first thing I said as a child, before I said "Mama" or "Dada"? I said "Leave me alone!"”

“Someone told me much later that you always know the people who are going to make a difference in your life, from the very first time you set eyes on them, even if you do not like them at all. And I had noticed him, as he had me. God help us.”

“why do you condemn a man whom you have never met, whom no one knows and about whom even you yourself know nothing?”

“What then is time? If no one asks me, I know what it is. If I wish to explain it to him who asks, I do not know.”
Quid est ergo tempus? Si nemo ex me quaerat, scio; si quaerenti explicare velim, nescio.

“When is your birthday?” (…)
Wide silver-gold eyes swung to him. “You don’t know?”
“No.”
Pouting, she twirled a strand of her hair. “How can you not know?”
“Do you know mine?” he asked.
“Of course I do. It’s the day you met me.”

“I remember the time an older man asked me when I was young, "Do you know what you are doing now?" I thought it was some kind of trick question.
Tell me," I said.
You are building your memories," he replied, "so make them good ones.”