When the soy farmers need to protect their crops from the harsh sun, they use veils of white plastic cloth with string woven through it; despite being lightweight and almost transparent, it is indestructible. Entire fields are swathed in this material, which resembles enormous sails. The white fluttering sails do not stop the sun from entering and making the crops grow; the clarity and intensity of the sun is dulled, however. This is true of regret. It is a veil, and like all human emotions it serves to soften the impact of reality. It is a failed belief that we cannot experience the true brilliance of the light, but it is through fear that we veil ourselves from that brilliance.
The Blue Notebook, James A. Levine