Soul:
the spiritual element of a person, regarded as immortal.
http://www.askoxford.com/concise_oed/soul?view =uk
1. the immaterial essence, animating principle, or actuating cause of an individual life
2. the spiritual principle embodied in human beings, all rational and spiritual beings
http://www.m-w.com/cgi-bin/dictionary?book=Dic tionary&va=soul
1. the spiritual dimension of human beings, regarded by some religions as immortal, and viewed as distinct from the physical body.
2. the part of one's being that is regarded as surviving death.
http://www.wordsmyth.net/live/home.php?script= search&matchent=soul&matchtype=exact
The immaterial part of a person; the actuating cause of an individual life
http://ultralingua.com/onlinedictionary/index. html?service=ee&text=soul
Spirit:
Latin spiritus, literally, breath, from spirare to blow, breathe;
vital principle held to give life to physical organisms
http://www.m-w.com/cgi-bin/dictionary?book=Dic tionary&va=spirit
The vital principle or animating force within living things.
http://ultralingua.com/onlinedictionary/index. html?service=ee&text=spirit
the animating or vitalizing