Good health of the body is one of the essentials of happiness. However, being healthy in spirit is more important than that. If it is healthy, our body can live about 70 or 80 years, but our spirit is immortal. Our dead spirit is revived by accepting Jesus Christ and receiving the Holy Spirit, and then our spirit prospers and we come to enjoy eternal life in Heaven. When the life of body ends, those people who do not receive Jesus Christ will go to Hell and experience eternal death. The secret of the prosperity of spirit lies in accepting Jesus Christ as the Savior and living by the Word. ¡°Man shall not live on bread alone, but on every word that proceeds out of the mouth of God¡± (Matthew 4:4).