it is broad- but true because we worship God (give glory and honor to him) when we follow his guidelines and uphold every thing he has said. When we disobey him (sin) that is not worship. We are to worship in spirit and truth- the truth would be the word of God. That means taking the whole word of God, not picking and choosing what we like and throwing out what we don't like but following it totally. Of course we can't possibly because we are sinful people, but we can try our best and ask the holy spirit to help us. Worship is not just singing hymns (although it is glorifying) but doing everything that God says to give him honor.