John 6:39 This is the will of the Father who sent Me, that of all He has given Me I should lose nothing, but should raise it up at the last day.
It should be clear from the context
Pressing Toward the Goal
7 But what things were gain to me, these I have counted loss for Christ.
8 Yet indeed I also count all things loss for the excellence of the knowledge of Christ Jesus my Lord,
for whom I have suffered the loss of all things, and count them as rubbish, that I may gain Christ
9 and be found in Him, not having my own righteousness, which is from the law, but that which is through faith in Christ, the righteousness which is from God by faith;
10 that I may know Him and the power of His resurrection, and the fellowship of His sufferings,
being conformed to His death,
11 if, by any means, I may attain to the resurrection from the dead.
12 Not that I have already attained, or am already perfected; but I press on, that I may lay
hold of that for which Christ Jesus has also laid hold of me.
13 Brethren, I do not count myself to have apprehended; but one thing I do, forgetting those
things which are behind and reaching forward to those things which are ahead,
14 I press toward the goal for the prize of the upward call of God in Christ Jesus.
Only if you do not believe in the resurrection. Do you live in the fear of death?
Hebrews 2:
14 Inasmuch then as the children have partaken of flesh and blood, He Himself likewise shared
in the same, that through death He might destroy him who had the power of death, that is, the devil,
15 and release those who through fear of death were all their lifetime subject to bondage.