When you practice staying present, one thing you'll quickly discover is how persistent the story line is. Traditionally, in the Buddhist texts, our tendencies with their habitual story lines are described as seeds in the unconscious. When the right causes and conditions come together, these preexisting propensities pop up like flowers in the springtime. It's helpful to contemplate that it's these propensities and not what triggers them that are the real cause of our suffering.
Pema Chodron