Curved lines can be aggressive or gentle, or both if flowing from one to the other.
A gentle curve is generally pleasing to the eye and can represent many things. Curves are familiar to us as they are present in nature and in the human body, so we feel a natural sense of intimacy, safety and comfort.
When a gentle curve is presented with horizontal and vertical lines we sense a movement within something rigid. We can play with that concept, perhaps the curved form is trapped, or it is escaping.
Becoming aware of these meanings will help us tell a story in our work.