What do our beliefs come from?

The late Stanley Grenz, professor of Systematic Theology at Regent College, Vancouver wrote in 1998:

Contemporary sociologists have discovered that what we hold to be true does not arise in a vacuum. We gain our fundamental beliefs from a variety of sources. Above all our convictions are related to the way we are socialized, the society in which we live, and what we have come to accept from what others tell us. In short, beliefs arise out of the community in which we participate.

Therefore, our quest for beliefs that sustain us leads us to search for a community that embodies the answers to life's deepest questions. And where can I find such a community of faith?

From What Christians really believe and why?, pp 18-19