One thing that anyone who wants to be used by God should bear in mind is the need to be blameless. This is the prerequisite for a child of God who wants to serve God at any level. The Bible says in 1 Timoty 3:1-2a:
"This is a true saying, if a man desire the office of a bishop, he desireth a good work. A Bishop then must be blameless..."

Being blameless has two advantages: Firstly, it saves the vessel the calamity of being destroyed by the User, the Almighty God. When a person volunteers to serve the Lord, it is dangerous for the fellow to be unclean, because the holiness of God destroys unclean vessels, just like electric current without insulation. There is a measure of holiness that God Himself bestowed upon man through obedience to His Word, which qualifies man to serve Him. The Bible says concerning Isaiah, how he admitted his sinful state, then God purified and cleansed him of his iniquity to qualify as a true prophet (Isaiah 6:5). Then, the angel of the Lord came and touched him with fire from Heaven and he was purged of his iniquity. Here, we see the mercy of God upon the vessel that He decided to use for His glory. There is a lesson we must learn from this scripture: the prophet admitted his sinful state and God came to his aid for cleansing. How wonderful would it be if those who profess to be children and ministers of God will be homely with the verdict of God concerning the Adamic nature of man and surrender to His holiness for mercy?
The second advantage of a blameless vessel is that his life glorifies the Almighty God. God is honoured in his life and He shows-off the fellow, then ultimately prospers and protects him eternally.
"And the Lord said unto Satan, has thou considered my servant Job, that there is none like him in the earth, a perfect and an upright man, one that feareth God, and escheweth evil?" Job 1:8

Though Job suffered many trials, but just as the Bible says, his end was better than his beginning;
"So the Lord blessed the latter end of Job more than his beginning..." Job 42:12.
Written by Pastor E.A. Adeboye.