Romans 8:33 Who shall bring a charge against God's elect? It is God who justifies. 34 Who is he who condemns? It is Christ who died, and furthermore is also risen, who is even at the right hand of God, who also makes intercession for us. 35 Who shall separate us from the love of Christ? Shall tribulation, or distress, or persecution, or famine, or nakedness, or peril, or sword? 36 As it is written: "For Your sake we are killed all day long; We are accounted as sheep for the slaughter." 37 Yet in all these things we are more than conquerors through Him who loved us. 38 For I am persuaded that neither death nor life, nor angels nor principalities nor powers, nor things present nor things to come, 39 nor height nor depth, nor any other created thing, shall be able to separate us from the love of God which is in Christ Jesus our Lord. NKJV
Paul asks who will bring a charge against God's elect? He answers his question in the same verse, it is God who justifies. Then Paul asks who condemns us. Then He answers that question- it is Jesus. God the Father has granted all judgment to Jesus. Next Paul defines the love Jesus has for us. In verse 39 Paul states that no created thing can separate us from the love of God which is in Jesus.
John 15:1 "I am the true vine, and My Father is the vinedresser. 2 Every branch in Me that does not bear fruit He takes away; and every branch that bears fruit He prunes, that it may bear more fruit. NKJV
Jesus is the vine and the Father, who is not a created thing, is the vinedresser. The vine dresser, the Father, separates all unfruitful branches from Jesus.
John 15:5 "I am the vine, you are the branches. He who abides in Me, and I in him, bears much fruit; for without Me you can do nothing. 6 If anyone does not abide in Me, he is cast out as a branch and is withered; and they gather them and throw them into the fire, and they are burned. 7 If you abide in Me, and My words abide in you, you will ask what you desire, and it shall be done for you. NKJV
Jesus went on to say that we must abide in Him. If we do not abide in Jesus, we will be unfruitful, and the Father will separate us from Jesus. So, what work must we do to abide in Jesus?
1 John 3:22 And whatever we ask we receive from Him, because we keep His commandments and do those things that are pleasing in His sight. 23 And this is His commandment: that we should believe on the name of His Son Jesus Christ and love one another, as He gave us commandment. 24 Now he who keeps His commandments abides in Him, and He in him. And by this we know that He abides in us, by the Spirit whom He has given us. NKJV
If we keep the 2 commandments given in verse 23, we abide in Jesus. Anyone who abides in Jesus is the elect.