Mahatama Gandhi words are worth writing in gold as it shows the essence of the purpose in a few well defined words. He has stated a few words about the requirement of our national flag and same are as enumerated below:
"A flag is a necessity for all nations. Millions have died for it. It is no doubt a kind of idolatry which would be a sin to destroy. For, a flag represents an Ideal The unfurling of the Union Jack evokes in the English breast sentiments whose strength it is difficult to measure. The Stars and Stripes mean a world to the Americans. The Star and the Crescent will call forth the best bravery in Islam."
"It will be necessary for us Indians Muslims, Christians Jews, Parsis, and all others to whom India is their home-to recognize a common flag to live and to die for."
You can read about the transformation of our national flag here as it is important that each one of us knows that how we have been able to get our national flag in present form.