The concept of Vrittayah Pancatayyah Klishta Aklishta comes from Patanjali’s Yoga Sutras and refers to the five types of mental modifications or fluctuations that can either be painful (klishta) or non-painful (aklishta). These vrittis, or mental activities, shape the way we perceive the world and respond to experiences in daily life. https://www.yogkulam.org/blog/yoga-sutra-1-5-vrttayah-pancatayah-klishta-aklishta