It's extremely important to remember that the main purpose of doing sesshin is this burning out of thoughts by the fire of attention, so that our lives can be dispassionate and fundamentally unaffected by outward circumstances. If we don't sit regularly then we can't comprehend that how we wash our car or how we deal with our supervisor is absolutely our practice. There is no special time or place for great realization. It's nothing more than parking your car, putting on clothes, taking a walk. But if we are emotionally attached to the circumstances we're not going to realize that, and we will be unable to burn up each circumstance as we encounter it.