Badass Creed/Web Comics

Penny Arcade did a short story called the Lookouts, which had a Badass-in-Training Creed in the form of the Lookout's motto:

"The Eyrewood reaches top to toe,
And through this wood we all must go.
Let Winter freeze, and Summer burn.
What men must know, a boy must learn."

- Their credo is concise but also awesome: "May We Die in the Forest".
From the FBI agents in Sinfest

Every move you make
Every breath you take
Every law you break...
I'll be watching you

Tales of the Questor

The lord is my shepherd;
I shall not want.
He maketh me to lie down in green pastures;
he leadeth me beside the still waters.
He restoreth my soul;
He leadeth me in the paths of righteousness for his name's sake.
Yea, though I walk through the valley of the shadow of death,
I will fear no evil, for thou art with me,
thy rod and thy saff they comfort me.
Thou preparedst a table for me in the presence of mine enemies;
thou anointest my head with oil;
my cup runneth over.
Surely goodness and mercy shall follow me all the days of my life;
and I will dwell in the house of the lord forever.

From this Subnormality strip [1], the 115th Infantry Division of the Galactic Defense Force.
- "No one's fought like we're about to"
- Adapted at the end by the Hooker with a Heart of Gold, "No one's fucked like we're about to."