Faith is not something we give to God. In that case, faith would be a work, and a silly kind of work because it would be work we do even though it doesn't benefit anyone. But exactly the opposite is true. To have faith in God is to be "without works" before God. Faith is the way we as receivers relate apporpriately to God as the giver It is empty hands held open for God to fill.
Faith tells us that we do not exist simply to live our three score and ten years without pain, with ease and enjoyment, to accumulate possessions, power or knowledge, to receive accolades and enlarge our egos. How empty such a life would be! Faith is an expression of the fact that we exist so that the infinite God can dwell in us and work through us for the well-being of the whole creation. If faith denies anything, it denies that we are tiny, self-absorbed specks of matter who are reaching for the stars but remain hopelessly nailed to the earth stuck in our own self-absorption. Faith is the first part of the bridge from self-centeredness to generosity.

Volf, Free of Charge, 44, 45.