What is Emunah?
If you understand Emunah properly you realize that we have the capacity to believe in Hashem because he believes in us and gives us the ability to follow him. Emunah is a Divine gift which emantes from Above. Emunah is dveykus - clinging to Hashem. If we are not clinging - we are not believing. Connecting is double-sided. We can only connect with Him if he connects to us.
[Based on the Maharal in a number of places and requires more explanation which will come bli neder:-).]
We have a mitzva of Emunah every second of every day so it is mamesh mamesh inyanei d'yoma:-):-).