Varṇashramvyavastha (System of Classes and Stages of life) was the foundation of the Bharatiya society. The objective of Varṇashramvyavastha was to bring about progress in personal life through ashramvyavastha (Stages of life) and to unite and bring about the progress of the society through Varṇavyavastha (System of Classes). It is because of this system that for thousands of years, life in Bharatiya society remained stable.
Righteousness, wealth, desire and the Final Liberation are the four pursuits of human life according to Bharatiya culture. System of stages of life teaches a materialist what spiritual practice he should undertake to gradually adopt the path of Spirituality as his age advances.
In the stage of the retired householder as one lives in only one place, even though it is a forest there is a chance of developing attachment for that place. To avoid generation of such attachment a renunciant does not stay in one place for more than three days.
The Brahman’s duty is to impart knowledge to the society and to guide others spiritually along with achieving its own spiritual progress. Service cannot be done without humility and total surrender. No matter how great a Brahman is if mentally he does not become humble then he cannot attain the universality of a Sadguru.
The offering should always be to the Absolute Truth. Saints and Gurus are the manifest forms of the unmanifest God. Hence, any offering made unto saints and the Guru is as good as an offering to God Himself.
An individual is born in the class which is conducive for his spiritual progress. An individual should be classified in a particular class (varna) irrespective of his birth if he possesses the decisive characteristic of that class.
In Satyayug there was only one class - Hansa class. Since all were sattvik in nature they behaved righteously. Subsequently in every yug Righteousness declined progressively.