The fact that God made the Psalmist was a very humbling. God knew every part of Him physically, emotionally and mentally. There was no hiding from God. This made him examine his life through God and hate evil and become intolerant of those with wicked ways.
Knowing that God knew every part of him, in his closing prayer he asks God to search him for any wicked ways in himself so that they might be changed. He then asked God to lead him so that he would not sin against God.