Astika or orthodox systems literally mean “right belief”. It is a state in which a person lives strictly according to the teaching or his religion and does not follow anything else. Orthodox darsanas are revelations from the Vedas. There are six different orthodox darsanas, all of which I will discuss in the paragraphs of this essay. In the first paragraph, I will discuss Nyaya and Samkhya which are the first two astika systems, then I will discuss yoga and Vaisheshika, while my third paragraph will focus on the last two astika systems which are Purva Mimamsa and Vedanta respectively. . Nyaya is a school of logic that is also interested in rhetoric and debate. It explores the notion of pramana, which is the means by which one obtains valid knowledge. In the west, two premises lead to a conclusion. With pramana, there are six categories: perception, inference, comparison, testimony, postulation and negation. Primacy is not only given to empirical observations using the five senses, but also to liberating intuitive insights gained through yoga. On the other hand, Samkhya is one of the oldest darsanas and its aim is to understand the cause and solution to suffering. Reality is seen as two entities, Purusa and Prakrti. Purusa is the supreme consciousness, or the true Self. Prakrti is nature or materiality. It is composed of three components, or gunas: sattva guna of luminosity, clarity or purity; rajas guna of passion and activity; and the tamas guna of inertia, dullness or opacity. Purusa is the impassive observer of all phenomena. Tamas guna reaches its peak within the gross elements, or mahabhutas. The five gross elements are earth, water, air, fire and ether/space. For Samkh...... middle of paper ......ta is concerned with studying the meaning of Vedic scriptures. The Purva-mimamsa (primary survey) is the first part of the study and refers to the mimamsa. The Uttara Mimamsa (investigation into it) is the second part and refers to Vedanta. Memamsa addresses the subject of action, particularly ritual action, and Vedanta addresses the subject of knowledge. Mimamsa's primary focus is Vedic apologetics, and he holds that valid sources of knowledge constitute sufficient conditions. The aim is to remove any doubt during reading which could arise from a misunderstanding of the text. The value of ritual and dharma is the focus, and it helps explain that rituals described in the Vedas without justification should still be practiced because it is everyone's dharma to perform all rites. The potential benefit of every dharmic action is the happiness of all beings..