I also adore leading, or more often being led by, these foundational elements of yoga. This is That: Patanjali’s Yoga Sutras Padas 1 and 2 by Anand Mehrotra, gets right to the heart of your question when he writes “… it is very dangerous to translate it merely as “Thou shall speak the truth and only the truth.”” He goes on to explain that all of our truths are subjective, based our own experiences, and not based on any universal or unbiased truth. He extrapolates that if we are in conflict, our truth is filtered through the lens of that conflict.