What goes around...

... can/may/will come around and hack you down.

A simple example to demonstrate a simple point:

"A man had a cow. He milked his cow everyday and sold milk after mixing water therein (fraudulently). One day there was a flood which drowned the cow. One of his sons said to him, 'The waters which you mixed with milk gathered together and washed away the cow...'"

(Source: Ihya Ulum-id-Din)

Do no evil.

Learn to Interpret

"... I never observed him [Mufti Azeez ur Rahman (RA)] rebutting anyone in their face... 'you did this wrong'. Rather, even when somebody had erred, he would say, 'No doubt you meant this...' In this way he would interpret, redress and present the correct version in such a way the listener would be in doubt as to his error but never forced into a confrontation or show down.

... redress the error in a positive and mild manner and keep your heart clean...

... Rasulullah (SAWS) said, 'Do not dispute with your brother...'"

(Source: 'Ashraf's Blessings of Marriage' by Hafiz Aslam Patel)

Very difficult. I put the quote forward as a goal for myself. Something I am far from having accomplished.