All of the Runes have an image, or symbol, that sets the train of recollection, ideology, and meaning in motion. This image isn't the 'meaning' of the rune, it is the picture that sparks off of the meaning and gives it form and reality.

The prompt-symbol for Sigel is the lightning bolt. The meaning is one of sudden and complete victory, with the force of lightning. The absolute brightness in the flash is also evoked, with the meaning that all will become clear. Just as the brightness of the lightning flash overcomes the dark of the storm, Sigel also stands for the victory of Light over Darkness. Understanding triumphing over Ignorance is also a part of this victory, and Free Will over Coercion.