Omission is a sin only if, in the process of deceiving, you forget the truth. Lying is a sin only if, in the process, the lie becomes the only truth.
Julianna Baggott (2001). “Girl Talk”, p.232, Simon and Schuster

Omission is a sin only if, in the process of deceiving, you forget the truth. Lying is a sin only if, in the process, the lie becomes the only truth.