His assertion comes in the backdrop of recentincidents of violence against some members of a minority community in the country.
Addressing a function here, Mukherjee said India is diverse with 130 crore people who follow seven religions, speak 200 languages and 1,800 dialects. Three major ethnic groups live under one flag, one Constitutionand one administrative process.
"This is the ethos of India. Yes, we must have change. We must have improvement. We must move forward. (But) Not in isolation, not in groups, not in individual, not in caste or community but for the entire land mass of India," the president said.
Mukherjee also referred to the major reforms brought by the Narendra Modi-led government including the presentation of budget in February 1 instead of February 28, among others.
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He appreciated the Goods and Services Tax (GST), slated to be rolled out from July 1.
The president said there have been a series of central and state taxes including excise, service tax and Value Added Tax.
The president was speaking during the inaugural session of a global summit on "Academics and economic reforms - role of cost and management accountants".
The event was organised by the Institute of Cost Accountants of India (ICAI) and attended by West Bengal Governor Keshari Nath Tripathi, among others.
Mukherjee said he had introduced in 2011 a Constitution amendment bill to facilitate the GST but it could not win the majority.
The president emphasised on providing quality education and skills to young population of the country which can act as the biggest workforce provider to the world.