There are many stories about what taijiquan is and where it came from.
I noticed that many of them involve founders who did not invent the art, but are said to, by drawing from pre-existing martial sources and arts.
In study i have found amazing and thorough correlation with taoist and vedic concepts and a link to martial arts. Tao-mo aka bodhidharma is recorded on internal records in Indian martial arts as being a practitioner of Kalari.
Many arts like xingyi, baguazhang and taijiquan have tales pertaining to taoist monks, i believe these tales to be accurate to a large degree though completely obscured by modern research conundrums.
I find very strong indication in the Dao-De-Jing that the text is actually related to martial and spiritual practices and that the author(s) were practitioners of an art that i consider to be ancestral to taijiquan.
There is so much to this and I don't have time to present it right now, but I was wondering if anyone would like to share their own thoughts and research about this.