The function of mindfulness is to prevent distractions. The more stable our mindfulness, the fewer distracting thoughts we will have…

The function of mindfulness is to prevent distractions. The more stable our mindfulness, the fewer distracting thoughts we will have. If we meditate with strong mindfulness our mind will remain on its object without distraction and we will naturally develop stable concentration.

Venerable Geshe Kelsang Gyatso Rinpoche,
How to Understand the Mind