We are all Buddhas, but not all of us follow the Way.
In order to enter the Buddha Way, one has to make formless repentance, of taking refuge in the Triple Treasure, and vowing to practice the Three Collective Pure Precepts and the Ten Prohibitory Precepts.*
So we write them down in order for you to take good care of them and make them part of your lives.
The Triple Treasure is:
I take refuge in the Buddha.
I take refuge in the Dharma.
I take refuge in the Sangha.
The Three Collective Pure Precepts are:
Refrain from all evil.
Practice all that is good.
Purify the mind.
The Ten Prohibitory Precepts are:
Refrain from taking life.
Refrain from stealing.
Refrain from committing adultery.
Refrain from telling lies.
Refrain from using intoxication.
Refrain from misguided speech.
Refrain from extolling oneself while slandering others.
Refrain from being avaricious in the bestowal of the Dharma.
Refrain from being angry.
Refrain from abusing the Triple Treasure.
* Taken from Returning to Silence, a Dainin Katagiri book.