A child of God is not a son of God, though he is an heir of God's kingdom, but still a child of God while on earth hasn't attain sonship, he is still weak and can falter at anytime, and so nothing can be entrusted to him by God.
Only those who have grown to become sons can stand unwavering to the evil one and also to involve themselves in the Father's business, because they have grown to a stage where God can trust them. Can God trust you?
A child of God who has attain sonship cannot sin, because God's seed remains and has fully grown in him, for he has been built on the word and filled with the holy spirit. A child of God, though his name written in the book of life, can waver if he doesn't stand firm, he is a child, an infant, because he is not yet fully grown, making it possible to fall astray if he doesn't give himself more to Jesus. But you should know that everyone who has attained sonship were once an infant, therefore there is no excuse.
" It was he who gave some to be apostles, some to be prophets, some to be evangelist and some to be pastors and teachers, to prepare God's people for works of service, so that the body of Christ may be built up until we all reach unity in the faith and in the knowledge of the son of God and become mature, attaining to the whole measure of the fullness of Christ. Then we will no longer be infants tossed back and forth by the waves, and blown here and there by every kinds of teaching and by the cunning and craftiness of men in their deceitful scheming."
God has called us to do His work through Christ Jesus, we can't do alone, after all it was the labor of the apostles we are enjoying today, if God had not used them to perfect His work, we would not have heard of the gospel or have interest in it, that's why God is using his vessels to convey his word to strengthen and build us in Christ Jesus.
Not many woke up one morning few years after they we're born and decided to follow Jesus without hearing the word of God, nobody woke up one morning when he was four years old, picked up his bible to study when he haven't heard the word, I mean can a four year old even read.
That is why God has been using his vessels, we are merely vessels to be used by God to do His work since He can't come down to earth and do it Himself, all we have to do is surrender ourselves totally and give our time to Him. That is why He also sent Jesus in human flesh, to establish a new era of gospel on earth, building God's kingdom in the hearts of men for the salvation of all mankind.
This gospel of salvation Jesus spread through; first, His apostle and then till this day, through prophets, pastors, evangelist and so on. He did this so that even right from birth, and when we can't read and write properly we can still hear his word and receive it to heart, because everyone is born of sin. God has planted a seed in the heart of anyone who hears the gospel. Everyone who has heard the gospel has a seed sown in his heart, and that seed can only be received and developed by the spirit of God in them.
The state of man's heart matters a lot, it determines if God's seed in you will grow or not. Your heart is your spirit man and your heart also is like a soil. There are different soil, just as " the parable of the sower." If you degrade your soil, that is; your spirit man even more, the more likely God's seed in you, which is God's word won't grow.
For this reason he has sent his servants to strengthen and build us in the word through Christ Jesus. Right from the moment we become born again, God's seed in us will starts growing, so that we will no longer be infants, but be fully mature in the fullness of Christ. He uses his vessels to give life out of the fullness of God's word deposited in them and also to reveal the deep things God. But still, only those who choose to grow in the spirit can receive his word which is life and understand the mind of God.
Everyone mature in the spirit were once infants, for maturity comes after infantry, the moment you become born again, the moment you receive Jesus into you heart, you are born again, born not as a man but born again as a child spiritually, no one is born as a man out of his mother's womb.
Now that you are born again as a child, you need to grow to attain sonship, though when you are born again as a child of God, you are entitled to reign and rule with Him in His kingdom, but it is not really a good thing to remain as a child, because a child can't take care of himself, making him weak against the attack of the evil one.
One being born again doesn't mean he'll enter God's kingdom, only those who have treasured God's word stored in their heart to grow unto maturity, becoming sons, are sure of entering God's kingdom. It is God's will that we should all grow in Him, for it is the natural process of a child to grow unto maturity.
A child has his vulnerability, because he can't defend himself properly, he doesn't have much zeal or determination for God, that is why you see most born again today rising and falling, undergoing same circle of sin and repentance, because they refuse to grow, they thought being born again is enough, they are too lazy to feed their spirit with God's word, they are not willing to sacrifice their all to follow Him in Other to attain maturity.
The battle for God's kingdom isn't a battle for children, you need to grow in other to be victorious, there is no such thing as normal Christian, its either you stand or fall, because the moment you become born again you are an enemy of the devil, he hates you just as he hates God, no, he hates you even more than he hates God, because of God's eternal purpose for you.
Let me give an illustration; A mother hen always looks after her chickens, when there is danger, when the birds of prey strikes, she either gathers them underneath her wings or fights back, since the chickens are immature, they aren't always on the watch except the mother, when in times of danger if a chick strayed far away from the mother, it gets taken away by the predator.
So it is today, the spirit of God has been knocking at the door of your heart to come in, since you were living in sin. The moment you become born again, you become an enemy, a target for the devil, and so Jesus is always on the watch protecting you from going back into the world, of course he is, but if you willingly stray to far from him as an immature child how can he protect you.
Not being mature renders you vulnerable to sin, and lacking in many things of the spirit, like the mysteries of God made known to a mature man in the spirit by the knowledge God's spirit has given him can't be understood by an infant, that's why some born again can't understand the time we are in, even if you tell them " Jesus is coming soon," they'll say; " maybe in fifty years to come," not understanding the time they're in, they plan and live their life as if they'll raise generations.
When you are mature in the spirit, you live a life without sin, because God's seed remains in you, you cannot sin, only those who are mature in the spirit can say by His spirit they aren't bound to sin, unlike others who would say from time to time one will have to sin and then repent, but remember shall we continue in sin that grace might increase, don't deceive yourselves, take a stand to grow in the spirits
I will say this, as written in the word that i shall not boast, but for the encouragement of the weak:
" For it is by grace we are saved, through faith, and this not from yourselves, it is the gift of God, not by works, so no one can boast. '
A child doesn't grow in a day, you just have to give your life time to Jesus in faithfulness and when you've attain maturity you'll be surprised when you look back, and say; " was this the life I was living before."