Spiritual theoretical knowledge is important and more so is its revision. Otherwise, precious treasure of spiritual advancement is lost.

A king met a very beautiful fairy lady and she captivated his thoughts. He proposed her.

She said, 'I am a dangerous lady. If you will see your reflection anytime, I will turn into a frog and you will never get me again.'

King said, 'Not a problem. I will marry you'. He ordered that all mirrors from his palace to be removed at once and was satisfied that in the absence of any mirror, there will be no possibility of seeing his reflected image by his own eyes.

Once he went for hunting in a jungle. And went far after a deer as deer ran helter-skelter. In the process king felt extremely thirsty and saw a pond near by. The knowledge that reflection must not be seen was forgotten.

The moment king put his hands in the pond to collect water, he saw his reflection in the water. His queen turned into a frog.

The point is knowledge must present in the head all the time. It possible only by continuous revision of spiritual theory.

Hindu says, 'Theory must be revised again and again.' Hence spiritual reading, listening to discourses, revising it mentally must be done again and again to sustain in spiritual path.