"Oh, yes, that's interesting, well said. I must remember that."
And as age advances to the point that you have many more years behind you than you have ahead of you, you read it again--
"Wow--that's so profound. Didn't I read this once before? Funny how I forgot it."
As Rainer Maria Rilke (1875-1926) wrote in his Letters to a Young Poet:
I want to ask you, as clearly as I can, to bear with patience all that is unresolved in your heart, and try to love the questions themselves. . . . For everything must be lived. Live the questions now, perhaps then, someday, you will gradually, without noticing, live into the answer. 
 Rainer Maria Rilke, A Year with Rilke: Daily Readings from the Best of Rainer Maria Rilke, trans. Joanna Macy and Anita Barrows (HarperOne: 2009), 49.