John 5:27 Meaning

25Verily, verily, I say unto you, The hour is coming, and now is, when the dead shall hear the voice of the Son of God: and they that hear shall live.

26For as the Father hath life in himself; so hath he given to the Son to have life in himself;

27And hath given him authority to execute judgment also, because he is the Son of man.

28Marvel not at this: for the hour is coming, in the which all that are in the graves shall hear his voice,

29And shall come forth; they that have done good, unto the resurrection of life; and they that have done evil, unto the resurrection of damnation.