The surface of his painting, "Blue Square." is covered in extremely thick blue paint which he applied using his fingers.
VOA: special.2010.07.09
Thick walls are extremely heavy, and allow less room for windows and light.
VOA: special.2010.03.31
The critical factor in Fisher's formula is staying in stocks through thick and thin until those rare moments of transition to major bear markets, which are extremely unusual events and difficult to identify.