A young couple moves into a new neighbourhood.
The next morning while they are eating breakfast, the young woman sees her neighbour hanging the wash outside.
“That laundry is not very clean”, she said.
“She doesn’t know how to wash correctly. Perhaps she needs better laundry soap”
Her husband looked on, but remained silent.
Every time her neighbour would hang her wash to dry, the young woman would make the same comments.
About one month later, the woman was surprised to see a nice clean wash on the line and said to her husband:
“Look, she has learned how to wash correctly. I wonder who taught her this?”
The husband said, “I got up early this morning and cleaned our windows.”
And so it is with life. What we see when watching others..depends on the purity of the window through which we look.
And the couple's windows were dirty.
Hadith 6 (in Forty Hadiths of Imam Nawawi):
On the authority of Abu 'Abdullah al-Nu'man bin Bashir, radiyallahu 'anhu, who said: I heard the Messenger of Allah, sallallahu 'alayhi wasallam, say:
"Truly, what is lawful (Halal) is evident, and what is unlawful (Haraam) is evident, and in between the two are matters which are doubtful which many people do not know. He who guards against doubtful things keeps his religion and honour blameless, and he who indulges in doubtful things indulges in fact in unlawful things, just as a shepherd who pastures his flock round a preserve will soon pasture them in it. Beware, every king has a preserve, and the things Allah has declared unlawful are His preserves. Beware, in the body there is a flesh; if it is sound, the whole body is sound, and if it is corrupt, the whole body is corrupt, and behold, it is the heart."
[Al-Bukhari & Muslim]
-unknown author, shared from here.