Speak positively when discussing matters related to faith .

This hadith emphasizes the importance of speaking positively and kindly when discussing matters related to faith. It is important to remember that our words have power, and we should use them wisely. We should think before we speak, and if we are unsure about something, it is better to remain silent than to say something that could be hurtful or damaging. This hadith also teaches us that our words can have a lasting impact on others; therefore, it is essential for us to choose our words carefully so as not to cause harm or distress.