When a glass is broken, the sound of breaking disappears immediately whereas the glass pieces are scattered over the ground hurting whoever walks over it.
Similarly, when you say something that hurts people's emotions and feelings, the voice disappears immediately but the heart remains in pain for long.
Therefore, don't say anything except good and remember always the nine advises and prohibitions that Allah Almighty gave us in Suratul Hujurat (The Sura of Islamic manners) before you say something to anyone:
"Fa Tabayyanu": Investigate: when you receive an information, lest you harm people out of ignorance.
"Fa Aslihu": Make settlement: between your brothers as believers are brothers.
"Wa Aqsitu": Act justly: whenever there is a dispute try for settlement and act justly among both parties as Allah loves those who act justly.
"La Yaskhar": Don't ridicule people, perhaps they may be better than you to Allah.
"Wa La Talmizu": Don't insult one another.
"Wa La Tanabazu": Don't call each other with offensive nicknames.
7.-اجتنبو كثيرا من الظن:
"Ijtanibu Kathiiran min Aldhan": Avoid negative assumptions, indeed some of the assumptions are sins.
"Wa La Tajassasu": Don't spy on each other.
9.-ولا يغتب بعضكم بعضا:
"Wa La Yaghtab": Don't backbite each other. Its a major sin equivalent to eating your dead brother's flesh.
Lastly Allah said in the Qur'an "Remind, for the reminder benefits believers".
May Allah continue to Guide us in all our affairs. AAMEEN
Bukan senang mahu jadi baik, perlahan-lahan inshaAllah.