Law : Constitution and its preamble

Our Indian constitution came in to force on 26th, January 1950

Preamble is sole of our constitution 

so we can light on our preamble which mention as follow : 

THE CONSTITUTION OF INDIA

WE, THE PEOPLE OF INDIA, having solemnly
resolved to constitute India into a [SOVEREIGN
SOCIALIST SECULAR DEMOCRATIC REPUBLIC] and
to secure to all its citizens:
JUSTICE, social, economic and political;
LIBERTY of thought, expression, belief, faith and
worship;
EQUALITY of status and of opportunity;
and to promote among them all
FRATERNITY assuring the dignity of the individual
and the [unity and integrity of the Nation];
IN OUR CONSTITUENT ASSEMBLY this twentysixth
day of November, 1949, do HEREBY ADOPT,
ENACT AND GIVE TO OURSELVES THIS
CONSTITUTION.

So, here each word which either in capital letter or in bold format having independent and great and deep meaning .

main difference which i want to mention here which i mention in preamble which I underline regard's date of existence or formation is 26th November 1949 and date of on which Indian constitution exactly came in to use i.e. force is 26th January, 1950. 

Indian Preamble.

Regard's

Adv. Mayur S. Gadave