The mind is a horse. When you sit on the horse, either you control the horse or else you lose control and fall down.
The thoughts in our mind are always racing in different directions. A skilful master can control the direction. Others fall prey.
A skilful master uses love, human values, positivity and detachment to stay in control. A novice falls prey to greed, ego, jealousy, and pride.
Thoughts are in constant fluidity. They need to be properly trained, controlled, and directed.
Control your mind or lose control!