If you are curious, you'll find the puzzles around you. If you are determined, you will solve them.
A good puzzle, it's a fair thing. Nobody is lying. It's very clear, and the problem depends just on you.
The problems of puzzles are very near the problems of life.
I wanted nothing else than to make the object as perfect as possible.
Now, after the Cube, I still don't have any plans to make anything like it.
Once I completed the Cube and demonstrated it to my students, I realized it was nearly impossible to put down.