I earned the shit out of the truth. I went to xur and realized my coins weren't on my hunter. I tried using the app to get them from the vault, which didn't work. I had to actually run to the vault and run back to xur. Then I realized that my heavy weapon slots were full, again the mobile vault wasn't working. I had to run back to the vault again. When I finally got back to xur I was able to buy truth. It took time and hard work for me to earn truth, but it is worth it.