All things are preceded by mind, 
Mind is their master, they are produced by mind. 
If somebody speaks or acts 
With a purified mind, 
Hence happiness follows him, 
Like never departing shadow.

This verse is closely related to the previous one . If the mind is purified, the mental phenomena it creates are also pure. Therefore, joy and happiness follow as surely as suffering and sorrow in case of a defiled mind. As we can see from these two verses, happiness and suffering depends on us entirely, on our own minds, on the thoughts that we are harboring. There is no other way to happiness then purification of mind and ultimately, in destroying all the defilement completely and reaching the highest goal, the awakenment or Nirvana.