French phrase
Le plus important est ~.
Meaning
The most important thing is ___.
When to use it
It identifies what should be given highest priority. Firm but calm, often used for security or quality.
Example dialogue
Le plus important est la sécurité des données.
The most important thing is data security.
Très bien, on va chiffrer toutes les bases de données.
Very well, we'll encrypt all the databases.