From the Aspiration of Samantabadhra:
"All that appears and exists, all of samsara and nirvana,
Has one ground, two paths and two results.
It is the display of awareness and ignorance...
The ground of all is uncomposed,
An inexpressible, self-arisen expanse
Without the names "samsara" and "nirvana."
If it is known, buddhahood is attained.
Not knowing it, beings wander in samsara...
At first, for bewildered beings
Awareness did not arise on the ground.
That obscurity of unconsciousness
Is the cause of bewildered ignorance.
From that unconsciousness
Emerged terrified, blurry cognition.
Self - other and enmity were born from that.
Through the gradual intensification of habit
Sequential entry into samsara began.
The five poisonous kleshas developed.
The actions of the five poisons are unceasing.
Therefore, ... the ground of the confusion of beings
Is mindless ignorance...
The connate ignorance
Is a distracted, mindless cognition.
The labeling ignorance
Is holding self and other to be two.
The two ignorances, connate and labeling,
Are the ground of the confusion of all beings..."