On what grounds are you filing for divorce? <justifiable reason>
On what basis have you made your judgement? <principle>
Sometimes a moment (or six) of reflection helps me. Sit back, think about the answer. (Rome wasn't built in a day.) Time is gorgeous.
I attribute it to 3 year olds.
I need to clarify that statement. That is, I teach 3 year olds in the day; adults at night. It's the day "job" that teaches me to be a better and more patient person.