All in God and Temptation

When we pray the Lord's Prayer and say the words "lead us not into temptation", what do we think that means? Do we think we are asking God to keep us from experiencing temptation? Do we understand it to mean that we are asking God Himself not to tempt us? Do we think it literally means that God should not purposely lead us into tempting situations? Or do we feel we are asking God to lead us away from our natural inclination to be tempted by sin?