Send us a text What is assertiveness and how do I develop it in a healthy manner? Assertiveness is the ability to say what you need, want, feel, or think in a positive, direct manner without being too aggressive or passive. Assertiveness allows healthy boundaries to be expressed and held. It also allows you to take others' feelings, thoughts, and position into account while holding your own feelings, thoughts, and positions as equal. How can my body language increase or decrease my as...