John 6:28-29 Then they said to Him, "What shall we do, that we may work the works of God?" Jesus answered and said to them, "This is the work of God, that you believe in Him whom He sent."
A farmer's work will include clearing the land, tilling the earth, sowing the seeds, watering the seedlings, etc. until the harvest. Similarly, for those doing the work of God, they are expected to believe in Him, Whom God sent until they are called home (His harvest).
James 2:17-18 Thus also faith by itself, if it does not have works, is dead. But someone will say, "You have faith, and I have works." Show me your faith without your works, and I will show you my faith by my works."
Thus, believing is working out our faith in God. When we read the bible, we begin to understand the attributes of God, His creation, the fall of man, His deliverance and salvation, etc. Then, it is our work to ensure that we believe these scriptures as the word of God and not just myths. If anyone thinks that creation and OT events are myths, then he is a non believer.
Once we believe the bible is the word of God, then our work is to try to understand God's redemption plan, the sacrificial Lamb of God, Saviour, Baptizer of the Holy Spirit, Comforter, Teacher, Messiah, etc. so that we can believe that Jesus was the One sent by God.
Once we believe that Jesus is the Christ, then from studying the bible we will know His words, teachings, commandments, instructions, etc. and then it is our work to believe them by obeying them.
Brethren, it is only when we obey and keep all the words, teachings, commandments, etc. of Jesus, that we are doing the work of God by believing Jesus Christ (as the Son of God, Saviour, Healer, Messiah, King of kings and Lord of lords, etc.), the One sent by God.
John 5:44-47 "How can you believe, who receive honor from one another, and do not seek the honor that comes from the only God? Do not think that I shall accuse you to the Father; there is one who accuses you—Moses, in whom you trust. For if you believed Moses, you would believe Me; for he wrote about Me. But if you do not believe his writings, how will you believe My words?"
Anyone, who seeks the approval of men, will reject Jesus' teachings. To satisfy the desires of worldly, carnal and covetous Christians, he will teach distorted truth and heresies for their itching ears.
Mat 15:8-9 "These people draw near to Me with their mouth, and honor Me with their lips, but their heart is far from Me. And in vain they worship Me, teaching as doctrines the commandments of men."
The biggest problem today is the craze for distorted doctrines and false teachings of men, which lead to worldliness and destruction. The truth in the Word of God that leads to holiness and eternal life, is shunned by depraved and covetous pastors, Christians and Christian leaders.
Brethren beware, for heresies will definitely lead many to damnation.