IF I ONLY HAD A BRAIN /HEART /HOME/ NERVE

The moral of the musical/novel The Wizard of Oz is pretty simple:

All four heroes believe they lack something they had got all along and they discovered while travelling together on their quest for the Wicked Witch of the West (or WWW, if you readers prefer to use an acronym).

Thus, the Scarecrow had got brains, the Tin Man had got feelings ("a heart"), the Cowardly Lion had got courage, and Dorothy had got the way to get back home (the other Wicked Witch's slippers, made of silver in the book and of rubies in the film). It took teamwork and a journey to discover themselves.