Proverbs 9:11, 12: You are only hurting yourself.

For by me your days will be multiplied, and years of life will be added to you. If you are wise, you are wise for yourself, and if you scoff, you will bear it alone. Proverbs 9:11, 12

Wise: restrain from acting in an evil manner, free from defect by the exercise of skill

Scoff: turn aside; speak indirectly; A primitive root; to make mouths at, i.e. To scoff; hence (from the effort to pronounce a foreign language) to interpret, or intercede -ambassador.

"You are only hurting yourself." 

That fact is true when one ignores wisdom. Choosing to act against wisdom's advice doesn't hurt God in anyway. It doesn't diminish the face that God is God. It doesn't change His standard. Rather, it simply causes you grief and sadness. 

"You are only hurting yourself." 

Then why, when we know the consequences, do we continue to ignore wisdom? Simple. We are not diligent in seeking wisdom. We don't have a heart permeated with a deep sense of reverence for God (Acts 9:31 MSG). We think we know better.

"You are only hurting yourself." 

Be wise—free from defect by the exercise of skill. Practice begin wise. Develop "wisdom muscle". The more wisdom muscle one has, the stronger the ability to make the right choices and continue to grow in wisdom! 

The choice is very clear. Develop "wisdom muscle" and continue a life designed by God with His blessings. Or be an ambassador of foolishness as you make a mockery of God's wisdom. If you choose the latter, you are only hurting yourself—for God will remain Almighty God!