If we get our self-esteem from superficial places, from our popularity, appearance, business success, financial situation, health, any of these, we will be disappointed, because no one can guarantee that we'll have them tomorrow.
I need to know the price of a gallon of milk and a dozen eggs. I need to know right now.
In visual perception a color is almost never seen as it really is - as it physically is. This fact makes color the most relative medium in art.