Kolinahr is a Vulcan mental discipline that emphasizes the suppression of all emotions. It is a key practice for Vulcans, who believe that emotions can lead to chaos and irrational behavior. By mastering Kolinahr, individuals aim to achieve a state of emotional control and clarity, allowing them to make logical decisions. The practice of Kolinahr involves meditation and mental exercises designed to help practitioners focus their minds and eliminate emotional responses. It is often taught to young Vulcans as part of their cultural education, reinforcing the importance of logic and reason in their society.