The document outlines general principles of taxation including that taxation is an inherent power of the state to impose contributions for public purposes. It lists the purposes of taxation as raising revenue, distributing wealth, promoting new industries, and protecting local industries. The essential characteristics of a tax include that it is an enforced contribution, generally payable in money, proportionate, and levied by the state on persons or property within its jurisdiction. A sound tax system has three basic principles - fiscal adequacy, equality or justice, and administrative feasibility. Taxes are classified based on subject matter such as personal taxes, property taxes, and excise taxes, and based on who bears the burden such as direct and indirect taxes. Certain entities like religious institutions are exemp