Parashas Metzora describes how the metzora who spoke lashon hara and contracted tzaraas was purified. Part of the purification process consisted of the Kohen taking two birds (14:4). Chazal (Arachin 16b) teach that specifically birds were used since they constantly chirp; consequently, helping atone for the metzora, who was sent outside for speaking lashon hara, a consequence of idle chatter.
The Chafetz Chayim explains that lashon hara results from a lack of appreciation of the gift of speech, and instead, one uses this gift thoughtlessly, resulting in lashon hara. One who truly appreciates the value of speech would always be on guard to make sure that this isn’t being misused.
The Chafetz Chayim brings a parable to help bring out this point. There was a man who, unfortunately, was mute. He worked very hard to find a cure to help him speak and went to many doctors, but to no avail. One time, he heard about a new specialist in this field who had a possible cure. This gave him newfound hope, and after consulting with this doctor and starting a treatment plan, he fulfilled his lifelong goal of being able to speak! How much gratitude would this man have to the doctor? Of course, he wouldn’t be an ingrate and badmouth the doctor.
The Chafetz Chayim explains that Hashem gave all of us this special gift of speech; is it not basic gratitude to ensure we do not misuse it and badmouth His creations? Instead, we can use this gift to thank Hashem. The Magen Avraham teaches that our mouths were only created in order that we thank Hashem. We can also use this gift to speak about the good in others.
In fact, the Zohar writes, “Just as we are held accountable for the negative words we say, we are also held accountable for the positive words that we didn’t say,” since the purpose of our mouths is to express our gratitude.
One time, Rav Yisrael Salanter was hosted by a simple peasant woman. Rav Yisrael engaged her in conversation, taking an interest in her lifestyle. He asked her how many cows she had, how much milk they produce, how many eggs her chickens lay, etc. Those who accompanied him were startled at how such an esteemed Rabbi could engage this woman in such simple talk. He explained that since this woman hosted them, they were obligated in gratitude. By asking about her lifestyle and taking an interest in her, she would feel very good about herself. This is a way of expressing his great gratitude toward her.