About Faith and works:
Faith without works is dead, as we were once dead to God. The "works" however is done by the Holy Spirit working through the Christian. He has prepared the works and so we (after enabled and being empowered by the Holy Spirit) cooperate, are empowered and guided by God to do good works. He gets the credit. The phrase, "by their fruit you will know them", is an example of some of these works: We bare fruit: love, joy, peace, longsuffering, gentleness, goodness, faith, meekness, self control and against these there is no such law.
We practice these throughout our lives and the Holy Spirit grows them. It's true, we can't just say we have faith, sit down and do nothing. It's like saying you love someone, yet never did anything to help them, care for them ... they would be empty words. We must demonstrate our love. It takes effort to unselfishly extend ourselves towards loving one another, and that translates into helping them grow spiritually, physically, emotionally, financially, whatever they need. Missionaries go off and dig a well for those who need water, they don't just pray for them to have water. Show me your works, but God gets all the credit and in the end He says well done, good and faithful servant for participating in His plan and purpose. He has a perfect plan and so has factored in all our sin, errors, blunders and selfishness. In the end are works are tested with fire, to show what they were worth ... all works done in vain and not done in love towards things that will last eternal will burn. What remains is what God intended, what is holy and perfect, that passes on into eternity.