For every negative state of mind there is an opposing state that can counteract it. Operating under this belief it becomes obvious that to cultivate a positive state of mind we must ensure that we minimise harmful and detrimental thoughts and emotions and remain present.
It is when we realise this and choose to take control of our minds that we begin to cultivate inner discipline.
The Dalai Lama said “Engaging in the practice of virtue is as hard as driving a donkey uphill, whereas engaging in destructive activities is as easy as rolling boulders downhill.”
Cultivating inner discipline takes time and is something not easily mastered. In the modern world we spend so much time focused on our external priorities yet how much time do you spend on your internal approach to the world? It’s this internal approach that ultimately determines your experience with the world.