Why does the lizard stick his tongue out? The lizard sticks its tongue out because that's the way its listening and looking and tasting its environment. It's its means of appreciating what's in front of it.
Why should we think upon things that are lovely? Because thinking determines life. It is a common habit to blame life upon the environment. Environment modifies life but does not govern life. The soul is stronger than its surroundings.
The most common cause of low prices is pessimism-some times pervasive some times specific to a company or industry. We want to do business in such an environment not because we like pessimism but because we like the prices it produces. It's optimism that is the enemy of the rational buyer.