Why You Can't Attract Spiritual Purification in One Week End or in One Retreat

The human mind is homeostatic. That means any change you make to your mind, like a pendulum, it swings back and forth,. And then ten years of that will radically change your mind. But on a daily basis, and even on a weekly basis, you don't see the changes so much. Most people, when thy sit down to meditate, they don't they're not sensitive enough to really feel the change that this makes. You can't achieved spiritual purification in one week end or in one retreat, yes?