Some people will tell you not to bother with soul. This is nonsense. Soul is simple. Soul is having a feeling, writing a tune that captures the feeling, and delivering it in a way that lets the listener share the feeling. Soul separates the happy songs that make you want to punch the air from the ones that wear your patience thin.
Soul makes every song a love song.
Soul is the difference between every record you love dearly and all the perfectly functional crap you'll hear on the radio tomorrow. Shack have soul. Their records matter, and it's about time they mattered to you. For intuitive expression, formal composition, and yes, soul, there are very few who can touch him. They'll come and go.