Introduction
Do you acknowledge the big God in you? A man's greatest challenge is the evils that come from within him. This is because they defile him and make him vulnerable to attacks from the enemy. And you can't defeat him because you habour his evils in your members, especially your thoughts.
And He said, “Whatever comes from [the heart of] a man, that is what defiles and dishonors him. For from within, [that is] out the heart of men, come base and malevolent thoughts and schemes, acts of sexual immorality, thefts, murders, adulteries, acts of greed and covetousness, wickedness, deceit, unrestrained conduct, envy and jealousy, slander and profanity, arrogance and self-righteousness and foolishness (poor judgment). All these evil things [schemes and desires] come from within and defile and dishonor the man.” - Mark 7:20-23 AMP
And these evil thoughts determine who you become, for as a man thinks in his heart so is he (Proverbs 23:7). This is so, despite what God says about you, because you're not aligning your life with God's word.
What God says about you
One profound thing God said in His word of you is in 1 John 4:4. And an understanding of this will change your life entirely.
Little children (believers, dear ones), you are of God and you belong to Him and have [already] overcome them [the agents of the antichrist]; because He who is in you is greater than he (Satan) who is in the world [of sinful mankind] - 1 John 4:4 AMP