Explanation:

The idea of liberty mentioned in Preamble under which there is liberty of thought, belief, faith, expression and worship.
The idea of Liberty refers to the freedom on the activities of Indian nationals. This establishes that there are no unreasonable restrictions on Indian citizens in term of what they think, their manner of expressions and the way they wish to follow up their thoughts in action. This is found to be an important tool in ensuring democratic framework. However, liberty does not mean freedom to do anything, and it must be exercised within the constitutional limits.this is second provision.