The Indian systems of philosophy are called as darshana – दर्शनम् in Sanskrit. The usual explanation given to the term darshana is दृश्यते अनेन इति दर्शनम् – The tattvas or principles of truth are seen or known through them, hence they are called darshanas. The eye and mirror are also called as darshanam in an ordinary sense as we see or know things through them. In this very short lecture, given to my students, a very high level overview of the astika (orthodox) and nastika (heterodox) darshanas is given with a special emphasis on Visistadvaita. The link to the lecture is – https://drive.google.com/open?id=0B5TNRFElGMV1VGp2ZXZOblFsRGc
