Matthew 20:12 Saying, These last have wrought but one hour, and thou hast made them equal unto us, which have borne the burden and heat of the day.
God does with us what He wants to do. He rewards us as He pleases. That is hard to accept in lots of ways. These guys were all working. They would expect to be paid by the hour and at a fair rate compared to each other. But that is not what happens.
The master pays what He agreed to pay and then gives some way more than what their hourly pay should have been. We can know that God is good. We can know that He is God and can do whatever He wants to do.
We are blessed regardless of what He does because it is more than we deserve and it is more than He promised us.
That being said you need to know that you will simply work as hard as you can and the results will depend on God and what He wants to do. We do not all get the same return but we do get a return and it is greater than what we deserve.
This is a hard lesson but it is an important lesson as we learn how big God is and how little we are!