Revelation 2:11

He that overcometh (or conquereth) shall not be hurt. — The words used are precise, and give certainty to the promise.

The second death. — This phrase is a new one in Bible language. It is said that Jews were familiar with it through its use in the Chaldee Paraphrase. It clearly points to a death which is other than that of the body; it stands in contrast with the crown of life. The expressions of Revelation 20:14; Revelation 21:8, exclude the idea that a cessation of conscious existence is intended. The life of the spirit is the knowledge of God (John 17:3); the death of the spirit, or the second death, is the decay or paralysis of the powers by which such a knowledge was possible, and the experience of the awfulness of a life which is “without God.”