Good News! The scriptures directly assert all
the current possessors of eternal life...
Yes, if Jesus has given you the gift to believe in him as Lord and Savior, as God in the flesh who died to save you completely, that is the sign that you indeed have been given eternal life.
24Verily, verily, I say unto you, He that heareth my word, and believeth on him that sent me, hath everlasting life, and shall not come into condemnation; but is passed from death unto life.
47Verily, verily, I say unto you, He that believeth on me hath
54Whoso eateth my flesh, and drinketh my blood, hath eternal life; and
I will raise him up at the last day.
1 John 5:11
11And this is the record, that God hath given to us eternal life, and this life is in his Son.
Even when we were dead in sins, hath quickened (brought us to life) together with Christ (by grace ye are saved). And hath raised us up together, and made us sit together in heavenly places in Christ Jesus.
...eternal life cannot be lost
28And I give unto them eternal life; and they shall never perish, neither shall any man pluck them out of my hand.
37All that the Father giveth me shall come to me; and
him that cometh to me I will in no wise cast out. 38For I came down from
heaven, not to do mine own will, but the will of him that sent me. 39And
this is the Father's will which hath sent me, that of all which he hath
given me I should lose nothing, but should raise it up again at the last
35Who shall separate us from the love of Christ? shall tribulation, or
distress, or persecution, or famine, or nakedness, or peril, or sword?
36As it is written, For thy sake we are killed all the day long; we are
accounted as sheep for the slaughter. 37Nay, in all these things we are
more than conquerors through him that loved us. 38For I am persuaded, that
neither death, nor life, nor angels, nor principalities, nor powers, nor
things present, nor things to come, 39Nor height, nor depth, nor any other
creature, shall be able to separate us from the love of God, which is in
Christ Jesus our Lord.
1 Peter 1:3-5
3Blessed be the God and Father of our Lord Jesus Christ, which according to his abundant mercy hath begotten us again unto a lively hope by the resurrection of Jesus Christ from the dead, 4To an inheritance incorruptible, and undefiled, and that fadeth not away, reserved in heaven for you, 5Who are kept by the power of God through faith unto salvation ready to be revealed in the last time.