Those who are ignorant of the supreme purpose of life will never be able to attain nirvana (liberation) in spite of their observance of the vratas (vows) and niyamas (rules) of religious conduct and practice of shila (celibacy) and tapas (penance).
Man learns through experience, and the spiritual path is full of different kinds of experiences. He will encounter many difficulties and obstacles, and they are the very experiences he needs to encourage and complete the cleansing process.
The churning separates the butter from the milk. In the same manner, through cosmic processes and upheavals of heat and cold, the five fundamental elements - earth, water, fire, air and space were separated and Earth, this Ball of Butter, emerged as the product of the churning.
