Harmful is all Harsh Speech, which grows only Conflict & Hostility!
Savatthi the Blessed
Buddha said this:
What, householder friends, is the Dhamma explanation befitting for oneself?
Here, householder friends, any Noble Disciple reflects thus: If someone were
to address me with harsh speech, abusive, aggressive, offensive, ruthless &
that would neither be pleasing nor agreeable to me. Similarly, if I were to
another with harsh speech, abusive, aggressive, offensive, ruthless & bitter,
would neither be pleasing, nor agreeable, nor acceptable to that other being
What is displeasing and disagreeable to me, is also displeasing and
to any other being too. How can I harm & hurt another being with what provoke
annoy and exasperate myself? Having reflected repeatedly thus, then
1: He/she will carefully avoid all harsh, abusive, aggressive, & offensive
2: He/she will persuade others also to abstain from all insulting & malign
3: He/she will praise speaking only kind and gentle words worth
In this very way, is this advantageous verbal behaviour purified in 3
Buddha once noted:
Beings are born with an axe in their mouth by which they cut their own
Source (edited extract):
The Grouped Sayings of the Buddha.
Samyutta Nikāya. [V:355]
To the people at the Bamboo gate...
never harm other beings by Hurting them with Harsh Speech!
on not whipping by speech, not stabbing with dagger-like words:
And on Right Speech (Sammā Vācā):
Avoid all Harsh & Aggressive