We can begin to know God, and believe in Him, but will we ever truly know Him? Not completely, at least not until we join Him in heaven. But we can get to know Him better each and every day. Our thirst to know God, to surrender to Him, should be unquenchable.
There are many ways to know God better. Be in your Bible. Pray. Worship. Fellowship with believers. Reflect God to non-believers. Any of them work, but the best way is to do it continually, and never stop. Not just on Sundays, not just holidays, not just when it works out, but always. That kind of devotion is surely rewarded here and for eternity.