When you share knowledge with others, you wouldn't lose knowledge. It remains complete inside you

*The Password to Divinity*

Shanti mantra says Poornamadaha. This is one of the greatest gifts to humanity. The concept of zero comes from this very shanti mantra. In linear mathematics you will always find that when something is taken out lacks. 

If you take out furniture from this room, this room minus that furniture will not be the same as before. This is linear thinking. But the Rishis give you a completely different outlook to life, spherical thinking - That is full and this is also full. This fullness has come from that, that still remains full. A mother gives birth to a baby. The baby is complete and the mother is also complete. Just because the baby is born, the mother is not lacking in something. In fact it has added to her glory. This is the concept of zero without which nothing could have happened on this planet -Science could not have progressed. The origin of the concept of zero is in this very shanti mantra. From the fullness comes fullness and still the fulness remains full.

You can go on analysing this very Shanti Mantra at various levels, on the spiritual, material, mathematic or at the level of physics, it is pregnant with a huge amount of information. When you share your peace with others, your peace will not be lost, when you share knowledge with others, you wouldn't lose knowledge. It remains complete inside you. Similarly in this universe, in fact it is multi-verse, enormously huge and dynamic many things are being born everyday and man things are dissolving every day and still both the Manifest and the Unmanifest are complete.

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Gurudev Sri Sri Ravi Shankarji

Ishavasya Upanishad