Each taegeuk form is represented by a trigram (such as ☴); trigrams are divination symbols derived from the I Ching. The trigram for Taegeuk Oh Jang represents the concept of "Seon" (also spelled Son). Seon symbolizes the wind, which is simultaneously powerful and yet gentle. This form should be performed with flexibility and unyielding power. The power is seen, for example, in the downward hammerfists and the many elbow strikes. The flexibility is seen for example in steps 15-16, where the torso, legs, and arms are all required to stretch and twist. (See the article Taegeuk for additional detail regarding the symbolism of this form.)