This is what yu said/wrote:
It is the nature of humanity to be sinful.
Vanity is not sin. It is the doorway/venue for sin to happen. That is why this from Paul: "Let this mind be in you, which was also in Christ Jesus" Philippians 2:5 (KJV) and this from Jesus:
"Abide in me, and I in you. As the branch cannot bear fruit of itself, except it abide in the vine; no more can ye, except ye abide in me".
"If ye abide in me, and my words abide in you, ye shall ask what ye will, and it shall be done unto you."John 15:4,7 (KJV)