What doth it profit, my brethren, though a man say he hath faith, and have not works? can faith save him? If a brother or sister be naked, and destitute of daily food, And one of you say unto them, Depart in peace, be ye warmed and filled; notwithstanding ye give them not those things which are needful to the body; what doth it profit? Even so faith, if it hath not works, is dead, being alone. Yea, a man may say, Thou hast faith, and I have works: shew me thy faith without thy works, and I will shew thee my faith by my works. Thou believest that there is one God; thou doest well: the devils also believe, and tremble. But wilt thou know, O vain man, that faith without works is dead?
This world would have us consider someone a "good" person by what they do. If they don't break the law, are kind to others, and are charitable, then they must be good.
However, God has different standards. We know that we are all sinful and the only way to salvation is through Jesus Christ
We must have faith in Christ. Works alone will not save.
That being said, we learn in this scripture that faith is shown by works. If we truly love Christ and follow Him, then we will want to do good works. We will want to clothe the naked and feed the poor.
Just knowing about God isn't enough (even Satan believes); we must also show our faith through works--our faith must be active!