That word does not furnish us with instruments in worship. Therefore the use of the instrument is not Godlike. That which is not Godlike, or godly, is ungodliness. The use of the instrument in the worship is not godly. Therefore the use of the instrument is ungodly.
Instrumental music is ungodliness when used in worship.
Therefore the use of the instrument in worship is sin. As is taught by A. Clarke in his commentary on this passage, whatever else is taught in this verse, it means that to worship in spirit and in truth is to worship like the Spirit in the truth has directed. That word does not teach any one to worship with the organ. Therefore those who use the organ do not worship in spirit and truth. God authorizes only in his word.