Exercising the Truth is a Strangers & Freaks side mission in Grand Theft Auto V given by Marnie Allen, Jimmy Boston and Epsilon Program, involving protagonist Michael De Santa.
It's the 7° mission for Marnie Allen, Jimmy Boston and Epsilon Program, after the Delivering the Truth mission.
This is an optional mission, not required for 100% completion of the game.
Exercising the Truth - Mission Details:
Michael needs to run 5 miles through the Grand Senora Desert to advance on his path to enlightenment.
Michael meets Marnie, Tom and Jimmy Boston at a mobile home in the Grand Senora Desert. Jimmy gives Michael a medal for his achievements so far and says Cris is very happy with him. Michael's next task is to wear his medal and Epsilon Robes and run five miles around the desert.
Once Michael has completed his five miles, Cris will call him and ask for him to bring a generous tithe to the Epsilon Program Center in Vinewood where Cris will personal greet him.
Gold Medal Objectives (100%)
There are no Gold requirements for this mission.
Exercising the Truth: Mission Objectives
- Travel five miles on foot throughout the Grand Senora Desert.
Exercising the Truth: Mission Info
- Mission Giver
Marnie Allen, 
Jimmy Boston, 
Epsilon Program - Mission Type Strangers and Freaks
- Protagonist (Playable)
Michael De Santa - Location Trailer Park, Grand Senora Desert, north of Harmony
- State / Area Blaine County
- Required for 100% No
- Featuring
Bison 
Cris Formage Jimmy Boston Marnie Allen 
Tom - Notes Not required for 100% completion of the game. The mission cannot be replayed afterwards, as it's done as a free roam activity.