I just love this devotional collected from the writings of Amy Carmichael (1867-1951). The other day I was thinking of this one and having trouble remembering the 3 – and then it showed up again.

The Three Sieves
“Is it true? Is it kind? Is it necessary?
All of us who have tried to remember these three sieves, and have used them, know what a help they are. We are sorry when we ever forget them, and we are very grateful when we are reminded of them in time to keep us from saying something untrue, unkind, or unnecessary.

“Perhaps these three sieves will help to keep some words from being spoken that would grieve the Spirit of love and hurt someone whom our Lord loves.
Is it true? Is it kind? Is it necessary?“

Finally, brothers and sisters, whatever is true, whatever is noble, whatever is right, whatever is pure, whatever is lovely, whatever is admirable—if anything is excellent or praiseworthy—think about such things.
Philippians 4:8 NIV