Why not study God's word instead of the tradition of men?
SOUL
2. New Testament Distinctions: (1) In the New Testament psuche appears under more or less similar conditions as in the Old Testament. The contrast here is as carefully maintained as there. It is used where pneuma would be out of place; and yet it seems at times to be employed where pneuma might have been substituted. Thus in John 19:30 we read: "Jesus gave up his pneuma" to the Father, and, in the same Gospel (John 10:15), Jesus gave up His "psuche for the sheep," and in Matthew 20:28 He gave His psuche (not His pneuma) as a ransom-a difference which is characteristic. For the pneuma stands in quite a different relation to God from the psuche. The "spirit" (pneuma) is the outbreathing of God into the creature, the life-principle derived from God. The "sour" (psuche) is man's individual possession, that which distinguishes one man from another and from inanimate nature. The pneuma of Christ was surrendered to the Father in death; His psuche was surrendered, His individual life was given "a ransom for many." His life "was given for the sheep"
(from International Standard Bible Encyclopaedia, Electronic Database Copyright (c)1996 by Biblesoft)
Spirit and soul are used interchangeably. You have picked one Scripture to show man is 3 parts, yet there are other Scripture that show man is 2 parts. There are two elements required for us to have a soul, spirit and body. Take away the spirit and the body dies, take away the body and the soul ceases to exist.