Mental modifications are the cause of unstable mind. Instability of mind can be stopped ,if we concentrate on our thoughts appearing in mind. Whatever we think in waking condition are among five types of Vritti as mentioned in Patanjali Yoga Sutras. Most of the time, the thoughts are found to be baseless and they are originated due to ignorance only. This ignorance is due to absence of knowledge of our real nature, true nature which is “purusha”. Ignorance is removed by regular and persistent practice of Yoga. Ignorance can be removed by gaining more insight into the nature of our mind and going beyond mind.