Om Swami
Why do I lie, and what is the root of lying?
The root of lying
People lie to look higher, to please someone they are attached to, to hurt someone they are not, or to hide or invent something. Being truthful needs a state of equanimity, and it is the most basic base of siddhis (spiritual powers).
When does a person lie? When he wants to show himself higher, or to please someone he is attached to, or to hurt someone he is not attached to.