Think about it.
1- When I Say, "I can increase in knowledge," No One Says, "We can't know everything, only God is Omniscient."
2- When I Say, "I am strong in the Lord," No One Says, "We can't be Invulnerable, only God is Omnipotent."
3- When I Say, "I will follow Jesus," No One Says, "We can't be everywhere, only God is Omnipresent."
BUT When I Say "I am saved from sin," people CRY OUT, "We've all sinned, there has only been one perfect Man."
Don't miss my point. People do not believe the word of God. It could be that they either fear holiness of heart and life, or they despise/reject the Holy Spirit (1 Th. 4:7-8).
1 Thessalonians 4:7-8
(7) For God hath not called us unto uncleanness, but unto holiness.
(8) He therefore that despises, despises not man, but God, who hath also given unto us his Holy Spirit.