Thanks for the above answer siam. I have a personal comment on the following. I hope it isn't deemed inappropriate here.
The definition of Faith is NOT BLIND BELIEF but firm belief arising out of knowledge and conviction. That is, belief in God that comes from both an intellectual and intuitive understanding.
I wonder is this is a place the Christians and Muslims simply need to work harder to be sure that we are communicating with each other, rather than merely talking at each other. Let me explain why.
We both use the term "Faith." As you explained it, in the Islamic understanding it arises out of knowledge and conviction. Now, certainly Christians experience knowledge and conviction as well. But that is not what we mean by faith. And then Muslims think that since we don't mean knowledge, that we must be talking about what is termed "blind belief". But that isn't what Christians mean either, or at least not those who are trying to grow in their faith.
For the Christian, the term "faith" is linked to the terms "hope" and even more so to "trust". And while there is no element of knowledge in that, I think that maybe you can see the element of conviction. To have faith in someone, to believe in someone, is to trust them.
For example, if I go to sit on a chair, I don't
know that the chair is going to support me (at least not until after I sit on it), but I trust that it will. With a chair that trust may come from a sort of knowledge, past experiences of having sat on the chair or knowing the person who built it, but it is still an expression of trust, a conviction that the chair will support me, and that belief is ultimately given its highest expression when I actually sit in the chair. That's they way in which we use the term "faith", which I don't think is all that different from what you mean. Is it? We certainly don't mean what is meant by the expression "blind faith".
The highest level of spirituality is called Ihsan and it is explained as a state of being where all our intentions and actions are based on the thought that God is in front of us. This state of consiousness (highest "self) is called nafs mutmainna or Peace/"self" of Peace.
Will you talk more about this, please?