Symbolising emotional blockages, barriers that keep us from thinking creatively in order to achieve our goals. Emotional blockages are caused by negative, traumatic, or stressful situations and events that the individual is not prepared for or used to dealing with.
See https://exploringyourmind.com/what-is-emotional-blockage/
"In action a great heart is the chief qualification. In work, a great head." - Arthur Schopenhauer