in the Old Testament there are two Hebrew works for soul, nephesh and ruach
they are associated with the principle of life
the nephesh was said to be given by god to adam
the word is often linked with the word 'heart', which was thought of as the seat of the will
in the teaching of Jesus also, the words is often used alongside 'heart' and 'mind', almost in the sense of 'inner self'
genesis 2:7: 'then the lord god formed a man from the dust of the ground and breathed into his nostrils the breath of life, and the man became a living being'