Emunah Brings Salvation
Emunah & bitachon
The Rebbe often attributed a yeshuah (salvation) to the power of emunah. A person who believes with emunah has the power to create a keli (a vessel) that enables him to receive berachah. Faith draws down shefa (abundant blessing from on high), as Yehoshaphat Hamelech said: "Believe in His prophets, and you will prosper."
Source: Divrei HaYamim II 20:20