Semiosis is a field of study concerned with how people and other organisms from this world derive meaning from their surroundings. There are three categories of signs: an icon, index, and symbol, based on how the sign relates to the object. An icon directly resembles the object, and an index has an implied association with the object. The sign logically is connected to the object.
Therefore, a symbol sign is inherently linked to the object; the connection is a matter of convention within a particular society. Symbol signs are widely taught because they are commonly misunderstood. God uses symbolism in His creations, for example, the sun’s symbolism which gives light and heat to us humans on earth. It shows that God has eternal power to create, employ and sustain such a great heavenly body, among others.