It is a response. Faith is not so much about making a lifestyle decision as it is accepting an invitation. Faith is not adherence to a creed but an exchange of love.
At least in my tradition, it’s common to use language like this when talking about someone first coming to faith, the moment of conversion, as if the invitation of God is only to conversion. But conversion is only the first response to invitations that have been going on for a lifetime, and will continue for a lifetime.
The invitations of God are continual and endless. At every moment he is drawing me to Christ, inviting me into his life. The Father is the initiator; I am the responder.
Faith is a continually responsive “yes.”