1 John 5:11

11 and this is the testimony, that life age-during did God give to us, and this -- the life -- is in His Son;

1 John 5:11 Meaning and Commentary

1 John 5:11

And this is the record
The sum and substance of it, with respect to the person of Christ, and the security of salvation in him, who is the true God, and eternal life:

that God hath given to us eternal life;
which is a life of glory and happiness hereafter; in the present state is unseen, but will in the world to come be a life of vision, free from all the sorrows and imperfections of this; and will be of the utmost perfection and pleasure, and for ever. This is a pure free grace gift of God the Father, proceeding from his sovereigns good will and pleasure, and which he gives to all his chosen ones, for they are ordained unto eternal life; to as many as he has given to his Son; to all that are redeemed by his blood, and are brought to believe in him: to these he gave it in his Son before the world began; and to the same in time he gives the right unto it, the meetness for it, and the pledge and earnest of it; and will hereafter give them the thing itself, the whole of it, to be possessed and enjoyed by them in person, to all eternity.

And this life is in his Son:
not only the purpose and promise of it, but that itself; Christ asked it of his Father in the covenant of peace, and he gave it to him, that he might have it in himself for all his people; and here it is safe and secure, it is hid with Christ in God, it is bound up in the bundle of life with him; and because he lives, this life will never be lost, or they come short of it.

1 John 5:11 In-Context

9 If the testimony of men we receive, the testimony of God is greater, because this is the testimony of God that He hath testified concerning His Son.
10 He who is believing in the Son of God, hath the testimony in himself; he who is not believing God, a liar hath made Him, because he hath not believed in the testimony that God hath testified concerning His Son;
11 and this is the testimony, that life age-during did God give to us, and this -- the life -- is in His Son;
12 he who is having the Son, hath the life; he who is not having the Son of God -- the life he hath not.
13 These things I did write to you who are believing in the name of the Son of God, that ye may know that life ye have age-during, and that ye may believe in the name of the Son of God.
Young's Literal Translation is in the public domain.