What was the most helpful advice Huzoor (aa) received from his parents?

During the virtual mulaqat of the female students and new-converts of the Netherlands with Huzoor^aa, which was held on 23 August 2020, a student asked Huzoor^aa, “What advice of your parents has proven to be most beneficial to you?” 

Huzoor^aa replied,

“Never ever tell a lie!”