Bottom up thinkers try to start from experience and move from experience to understanding. They don't start with certain general principles they think beforehand are likely to be true they just hope to find out what reality is like.

I don't know how many good books I still have in me I hope there are another four or five.

I hope I never get so hard up I have to do advertisements. I've gotten ridiculous offers.

To my utter despair I have discovered, and discover every day anew, that there is in the masses no revolutionary idea or hope or passion.

It has never been, and never will be easy work! But the road that is built in hope is more pleasant to the traveler than the road built in despair, even though they both lead to the same destination.