What is the significance of a preamble to a constitution?

The constitution of India provides for “equal rights” through different provisions:

Article 14:

To secure ‘equality before law’ and ‘equal protection of law’ to which only President and governors are exceptions.

The expression ‘equality before law’ implies absence of any special privileges in favour of any person. The second expression equal protection of law, means that the same law shall apply to all who are similarly situated.

Article 15:

Prohibition of discrimination on grounds of religions, race, sex, etc.

Exceptions:

i. Special provisions for women and children.

ii. Article 15(4) provides for special protections for groups of citizens who are economically and socially depressed.

iii. Article 16 ensures equality of opportunities in public employment. However, special measures could be taken for the development of women, children and weaker sections of society.

iv. Article 17 stands for abolition of unsociability in any form.

v. Article 18 stands for-abolition of titles by the state except those related to military and educational spheres.