People tend to assume that spirituality and the mundane life are separate, but this is not so. Spirituality and the mundane are of one mind. We use the same mind whether we engage in spiritual practice or pursue a mundane life.
If you can purify your mind, you can manifest happiness and reach nirvana. If you have attachments, a negative personality and thoughts but do not want to get rid of them, you will experience pain and worry.
We can say that the process of reaching nirvana is the process of purifying the mind. It is also the process by which we manifest our happiness. It means we correct the defects in our personality and try to get rid of our attachments, which are motivated by ego. If we can do this, we will get closer and closer to true happiness.
By Zen Master Miao Tsan