Question: Why is it that we are happy some days and other days we are unhappy?

Babaji:

Which is the happiest day in one's life? All are happy days to a person of jnana (true knowledge). Happiness is a conscious internal experience which is an effect of the extinction of all mental and physical desires. The lesser the desires, the greater is the happiness. Therefore, perfect happiness consists in the merger of all desires in the Absolute Being. The mind has no independent identity of its own. It is a conglomeration of the desires that sprout from the impulses. A cloth is essentially a bundle of threads. Threads are basically spun from cotton. Similarly, desires arise from basic impulses, and the mind is constituted of these desires. Just as a piece of cloth disintegrates if threads in it are pulled apart, the mind too can be destroyed by the eradication of desires.