what are the directive principles of …

Constitution deal with the Directive Principles of State Policy. The Directive Principles are the guiding principles for governance but are not enforceable by any court.
That does not change the fact that they are nevertheless fundamental to the governance of this country. These principles provide the social and economic guidance for Indian Democracy and pave the way for the establishment of a true welfare State.
As the name indicates, these principles command the State and its instrumentalities to follow certain fundamental principles while formulating and pursuing policies
These principles are the guiding light for the attainment of the objectives that our Constitution aspires for. These principles chalk the path for the State to follow in order to secure the greatest good for the greatest number in the way consistent with our Constitutional philosophy and vision.
The Directive Principles envision for all citizens the equality of opportunity and adequate means of livelihood, avoiding concentration of wealth in few hands. In short, the Directive.