Why is man's soul immortal and different from animals?

Les explains that resurrection is not merely being brought back to life; Lazarus still had to die. Resurrection is God's unique, sovereign act of bringing a human being back from the dead to a life of eternity, not to die again. The distinction for man goes back to Genesis: when God breathed into man's nostrils the breath of life, he became a living soul. That separated man from all other categories of life because man is immortal in the area of the soul. The body is not immortal, but the soul or spirit is, and those two are so closely connected they are almost used together. Revelation thus speaks of the resurrection of the just to immortality in God's presence, while the lost are resurrected to a life separated from God, the second death, yet continue through all eternity. Les notes some groups teach annihilation, but that does not line up with Scripture; the lost will suffer and experience regret and feeling throughout eternity. Christ was the first to experience resurrection, called the first fruits of them that slept.