The commandment is a lamp . . . to keep thee from the evil woman.
The only sure source of light for our Christian walk is found in the Scriptures. There are many instructions in Proverbs for young men to help you live a pure life before the Lord. Satan clutters up your path with temptations of every kind. Some you will fall for, some you may not. But the devil will try to make you fail. Keep reading the Word of God. Follow the instructions in it and keep yourself pure.