I used to think my greatest contribution as a musician in gathered worship was playing and singing well. It was natural for me to be passionate, but I later thought it was really the passion that I brought that was the most important thing. You still needed to do it well, but skill with no passion was not as good.
Although both these things are important, I now fully believe that unless they are built on the foundation of the “why” of worship we are missing the mark.
We gather to meet with God, because that is the whole salvation story. God wants to walk with us like he did with Adam and Eve in the garden; he sent Jesus to make this a reality, and corporately, the closest we are going to get to that before eternity is gathered worship. Gathered worship includes prayer, singing, fellowship, the sacraments, and hearing from His word.
So it is biblical to play with passion and skill (orthopraxy), but the “why” of worship is communion with God (orthodoxy). Literally enjoying His presence, His power, His love, His spirit.
May we as leaders all seek His face first, and to quote my friend, may our preparation to play, sing, pray, and preach be our time of consecration to our Lord!