Points
If the work of anyone abide, he shall receive reward. The work of everyone will Manifest.
It is God that tries the heart and knows the heart of men, it's in good ground that we keep the word. The seed is the word of God that preacher plants in the heart of man and as it grows, it is God that increases, it is Him that makes it grow in your heart
To do the will of God, you will know the doctrine and a preacher of God speaks the Word of God.
If the word of God is planted in good ground which is good heart it will grow and increases. It was planted and watered with more of the word of God and it will grow then the increase is what God does.
If you know the doctrine, that doctrines will also serve as fire that would bring out the best of you like fire bring out gold from the stone.
What we need is decision to do the will of God and God would see our heart and help us
Lesson
Whatever we do in this life all have reward, either you choose to do good or you choose to do wickedness but we all the the place that those that do good would end is heal fire, it is only if they repent. If you choose to be good, the reward that you will have is even in multiple of things that you do and the only way to do good is to be good to your fellow human being, not even God because you can't see God and God didn't ask anything from man than to give thanks to Him for the things that He does and He is still happy when Man part to Him in order to demand for what so ever we need.
No man can read another man's heart, it is God that reads the heart and He knows what is running in our heart and that is why He knows us even more than we know each other. God knows if you have good heart or bad heart and the good heart is like a good soil that is able to plant which is clay soil. Clay soil can hold seed, may it grow and be fruitful, that is how good heart does. After the preacher of God preach to the good heart, the good heart would hold the word of God and it would keep growing and be fruitful.
If you are to preach the world of God, it's a must to know the word of God, aim to do the things of God before you can just teach the word of God. You can't teach what you don't know, you would rather teach rubbish.
Just the way fire bring out gold from the stone, if you know the word of God, the word of God would bring out the best in you and you'll shine to the world even more than how gold shines.