Thought is greater then action.

The Alter of Kelm says that we learn from this week's Parsha that thought is greater then action.  When Hashem commanded them to fulfil the mitzvah of the Pascal Lamb they accepted it in their mind, and every time they thought about it, and accepted that they were gong to do it.  They got a reward each time that they had this thought as if they had done this.  We learn from this that we have to be careful that our thinking is always correct and not just our actions.

from a Short Video on Kosher Tube by Rabbi Avraham Tzvi Schwartz   "Every Moment-Parshas Bo"