I believe that if we don't accept Jesus death and resurection, get baptised, and live according his his will (which includes witnessing, being a strong member of a church, etc. [which I call works]) then we cannot go to Heaven. The exception to this in the Bible was the thief on the croos next to Jesus who through faith alone entered into paradise (not Heaven yet).
I can't point to a specific verse that spells this out, but the Bible in whole points this direction. Yes we are saved by faith through Jesus sacrifice on the cross. But not all are saved.
Please do not get me wrong, I am not a biblical expert. In fact I am still learning a great deal about my saviour and his word. I am seeking the truth of the Lord.
Me too. Probably until the day I die.