Sentence:  Unless the musicians themselves develop a prophetic lifestyle, the <WSD>selah</WSD> will be only an irritating piece of ritual. But if the musicians have an ear to hear, a <WSD>selah</WSD> will be a highly creative interlude that opens the door for the Holy Spirit to take the church into a higher level of inspiration. 
Meaning of the word marked with <WSD> tags:  A pause or rest of a contemplative nature.