"On no grounds; on all grounds. I don't care anything about the grounds. A woman doesn't have to have grounds—when she knows."
"Well, what about my grounds when I know to the contrary?"
"But you don't. You only know your history back to a certain point."
"I've only told you my history back to a certain point. I know it farther back than that."
"How far back?"
"As far back as anyone can go, from his own knowledge."
"Oh, from his own knowledge! But some of the most important things come before you can have any knowledge. You've got to take them on trust."
"Well, I take them on trust."
"From whom?"