[[[ why does it take faith to do those things? ]]] ?
It is because of this condition that the verdict of Scripture is heard: we are "dead in trespasses and sins" (Ephesians 2:1); we are "sold under sin" (Romans 7:14); we are in "captivity to the law of sin" (Romans 7:23); and "by nature children of wrath (Ephesians 2:3).
Only by the quickening power of the Holy Spirit may we be brought out of this state of spiritual death. It is God who makes us alive as we become His craftsmanship (Ephesians 2:1-10).