six philosophies

Today's lecture by Swami Prakashananda was about six philosophies. What's different about them and what do they share. He also gave details on three schools of Vedanta. Instead of paraphrasing the lecture, here are some comments instead:

There's a few lines by Guru Nanak about this:

chhi-a ghar chhi-a gur chhi-a updays.
There are six schools of philosophy, six teachers, and six sets of teachings.

gur gur ayko vays anayk.
But the Teacher of teachers is the One, who appears in so many forms.

baabaa jai ghar kartay keerat ho-ay.
O Baba: that system in which the Praises of the Creator are sung

so ghar raakh vadaa-ee to-ay.
follow that system; in it rests true greatness.

Do we really need to understand the various philosophies for our spiritual journey? The freedom we are seeking is in accepting the mystery that is the creation and its Creator. The philosophy is is a product and food for intellectual activity and it could enhance the ego.

These six philosophy show that the Truth is beyond our intellectual capability, it cannot be described, if it was then these great thinkers would have come up with one philosophy.

There are many resources available online about these philosophies.