1 Samuel 25:6
“ וַאֲמַרְתֶּם כֹּה, לֶחָי; וְאַתָּה שָׁלוֹם וּבֵיתְךָ שָׁלוֹם, וְכֹל אֲשֶׁר-לְךָ שָׁלוֹם”
“and thus you shall say, ‘Have a long life, peace be to you, and peace be to your house, and peace be to all that you have.”
King David sent messengers with greetings to a wicked man. The Zohar explains that we should not be the first to greet wicked and evil people. To make peace, King David concealed a blessing as a spiritual connection with his greetings. The two words “כֹּה, לֶחָי” accurately translated to ‘Have a long life’ are actually a code that unifies Malchut and Zeir Anpin.
The word ‘וְאַתָּה’ ‘and you’ is also a connection of Zeir Anpin with the letter ‘ו’ Vav and Malchut with ‘אַתָּה’, ‘You’.
If we have to be the first to greet a wicked person then we should learn from King David to bless God before.
A simple ‘Hi’ is not significant but in Hebrew we use the word ‘Shalom’, ‘שלום’, which has a powerful energy.