I think you are referring to the Unitarian Universalist symbol. See the related link.
The symbol of the flame in 'The Odyssey' is often associated with hope, guidance, and transformation. It represents the idea of enlightenment and a source of light in times of darkness. The circle, on the other hand, can symbolize unity, wholeness, and cyclical patterns of life.
The safety symbol for an open flame is quite simple to read and self explanatory. It is a plain colored background (usually yellow, red, orange, or black) with a flame in the center. It can come in different shapes such as square, triangle, or circle.
The scientific symbol for a Bunsen burner is a simple drawing of the device, typically represented by a small circle with a flame on top.
The symbol for an Equip Spell card is a cross (+). The cross is placed in the middle of a circle to resemble a sort of emblem.
The oxidizing symbol, a circle with a flame on top, indicates materials that act as strong oxidizers and can cause other materials to burn more readily. It signifies a potential fire hazard and the need for caution when handling these substances.
A fire symbol is a stylized drawing of a flame.
Because the flame is the only symbol they could think of XD
The symbol of perfection can vary depending on cultural or religious beliefs. In some contexts, a circle or a triangle is often associated with perfection due to their symmetry and completeness.
The symbol flame is for flammable materials.
A dollar sign is a tangible religious symbol. This symbol is used with catholic's.
A flame represents the Holy Spirit.
Perhaps swine.