The doctrine that human beings, compelled by the law of evolution, incarnate repeatedly in progressively higher lives—retarded by wrong actions and desires, and advanced by spiritual endeavors—until Self-realization and God-union are attained. Having thus transcended the limitations and imperfections of mortal consciousness, the soul is forever freed from compulsory reincarnation.

"Him that overcometh will I make a pillar in the temple of my God, and he shall go no more out" (Revelation 3:12).

Further Reading: Reincarnation by Paramahansa Yogananda