What makes you cry?
Understanding why Yosef and Binyamin cried.
If G-d wanted us circumcised, wouldn't he have created us that way? Understanding what circumcision has to do with a woman's impurity at birth....
Would you rather a pet Lion or Dog? Understanding why the dogs in Egypt didn't bark.
Can you do the mitzvah for the sake of the reward? Understanding the reward for giving charity.