From The Element Encyclopedia of Symbols
Edited by Udo Becker

Flag
  --A symbol of rule as well as of national or group membership. In war, it is a symbol of military honor and fidelity that is to be defended by sacrificing one's own life if need be. In addition, a fluttering flag is often regared as a symbolic expression of new beginnings and of resolve for future change.   --In the symbolism of Christian art, Christ or a lamb carries a flag as a sign of the Resurrection and of the victory over the powers of darkness.

Green
  --the color of the plant world and especially of spring in bloom; the color of water, life, freshness; the color of mediation between the RED of hell-fire and the BLUE of the sky. Green is frequently the antagonist of red, yet, as the color of life, sometimes also the substitute for red. As the color of annual renewal in nature, green is also the color of hope, longevity, and immortality.
  --In China, moreover, green is symbolically related to lightning and thunder and to WOOD and the Yin principle.
  --In Islam, green is the color of spiritual and material well-being, the color of wisdom and the prophets.
  --In the mythologies of many peoples, there are close connections and transformations between green and red. In Africa, for example, green, which represents the feminine, is sometimes thought to have arisen from red, which is masculine. The alchemists frequently saw transformation processes as interactions between regions that were symbolized by masculine red and feminine green. Green light plays a role among alchemists and occultists; it is encountered in nature during the burning of various chemical substances as well as during the rising and setting of the sun, where it appears as an extremely rarely observed manifestation of light known as the green ray, and is a symbol of death and life. The alchemists also saw the so-called secret fire, the living spirit, in the image of a green, translucent and fusible CRYSTAL. In alchemy, green in compounds such as Green Lion and Green Dragon usually indicates solutions that are capable of dissolving even GOLD.
  --Christian artists of the Middle Ages sometimes painted the Cross of Christ in green as a sign of the renewal brought about by Christ and as an expression of hope for humanity's return to Eden.

Gold
  --Since time immemorial, it has been regarded as the most precious of metals; it is malleable, can be polished, and is glittering, largely resistant to heat and acids and thus a symbol of immutability, eternity, and perfection. Because of its color (and other reasons), it became identified early everywhere with the SUN or FIRE. It is thus also frequently a symbol of (principally esoteric) knowledge. In Christian symbolism, moreover, gold is a symbol for the highest of virtues, love.
  --A gold background appearing in painted panels of the Middle Ages is always a symbol of heavenly light. It is common notion that gold is the earth's most intimate and most sacred secret.
  --The alchemists' attempts to make gold, which had to do with the search for for the PHILOSOPHERS' STONE, must be seen primarily in close connection with the attempt to purify the soul (which is symbolized by gold).
  --From a moral point of view, gold is assigned a negative value as the epitome of all earthly goods (synonym for MONEY) and thus is a symbol for worldly attachment or ambition. See EXCREMENT.

Excrement
  --Particularly among primitive peoples, excrement was often regarded as a substance embued with various powers; it was sometimes associated symbolically with GOLD.
  --Among some African tribes, there was a prevalent notion that manure piles were inhabited by souls that entered the bodies of women.
  --Among some peoples, high regard for excrement led to the ritual eating of feces, which Africans believe will enable them to incorporate into themselves the powers of the departed person or animal; the role that excrement had often played earlier in the preparation of medicines, also had to do with these ideas. In addition, the imaginary world of the anal phase during early childhood, uncovered by Freudian psychoanalysis, has to do with the high regard for excrement.