That should NOT be true for the mature believer. Maybe a baby Christians still in diapers
Galatians 5:24
And they that are Christ's have crucified the flesh with the affections and lusts.
What makes us children of God is IF we answer the Father's call to abide in Christ having turned away from our old life of sin and walk with Him in newness of life
Ephesians 5:1
Be ye therefore followers of God, as dear children;
Ephesians 4:22-24
put off concerning the former conversation the old man, which is corrupt according to the deceitful lusts;
And be renewed in the spirit of your mind;
And that ye put on the new man, which after God is created in righteousness and true holiness.
Romans 13:14
put ye on the Lord Jesus Christ, and make not provision for the flesh, to fulfil the lusts thereof.
Colossians 3:10
And have put on the new man, which is renewed in knowledge after the image of Him that created Him:
2 Corinthians 6:17
come out from among them, and be ye separate, saith the Lord, and touch not the unclean thing; and I will receive you.
This is what baptism is supposed to be about... making a covenant with the Lord, a public declaration of faith, a commitment to put off the old man and put on the new man and to walk in newness of life
Romans 6:4
Therefore we are buried with him by baptism into death: that like as Christ was raised up from the dead by the glory of the Father, even so we also should walk in newness of life.
We are called to cooperate with the Lord, to be co-laboroers with Him. He made us in His Image, so we have free will... the Lord desires for us to willingly choose to turn away from our old life of sin and come abide In Christ and not turn away, ever!
1 Corinthians 3:9
We are laborers together with God: ye are God's husbandry, ye are God's building.
It's God's work, His power, His ability... but WE have to choose to accept His offer to be His children and turn from darkness to walk with Him in the Light.
John 1:12
But as many as received him, to them gave he power to become the sons of God, even to them that believe on his name:
2 Corinthians 5:21
For he hath made him to be sin for us, who knew no sin; that we might be made the righteousness of God in him.
Getting born again is the introduction and the starting point and if one truly believes and dies moments after getting born again, yes they would go to Heaven.
But few die immediately after getting born again so it remains to be seen... will WE to choose to accept His offer to be His children and turn from darkness to walk with Him abiding In Him until the end of our lives so that we might be saved???
Matthew 24:13
But he that shall endure unto the end, the same shall be saved.
Endure to the end as in... DON'T fall away!