Christianity and the walk thereof, are often acquitted to a music rendition. The Body, yes, must be in harmony. Yes, there should be different instruments (Romans 12:4-5). But does what instrument you embody really matter? I think so.

For instance, I play the ukulele. A little bit of guitar, but I prefer the uke. Reason for this is that a guitar can easily play a sad song. It is virtually impossible to play a sad song on a ukulele. It is a beautiful feature of it. Its chords always make a joyful noise and reinvent sad melodies (Psalm 100:1-2). It dares to defy the crushing weight of depression. 

Sometimes Christians may need the realist demeanor of a guitar, but more often than not, I believe we should be ukulele Christians. We should shine the joy of Christ everywhere and rewrite sad notes that keep people blue (Romans 12:12). As people play along in the band of life, lift the light load of the ukulele and smile (Psalm 95:1).