Amos 2:13 says, Behold, I am pressed under you, as a cart is pressed that is full of sheaves.  God through Amos was speaking to Israel, His chosen people, at this point.  Amos had listed some of their sins, against both other people and even God's prophets.  In this verse, God said that their sins pressed down on Him, as though He were under a cart full of sheaves.  We need to acknowledge that our sins, no matter how minor they may seem, are a burden to God, especially if they are committed by those who profess to be God's people.  God had sent the people of Israel prophets, with the Nazarites being singled out especially, and they had attempted to and often did corrupt them.  God has sent us the Nazarite, Jesus Christ, and though He cannot be corrupted, we as His followers often corrupt His teachings.  Verse fourteen says,  Therefore the flight shall perish from the swift, and the strong shall not strengthen his force, neither shall the mighty deliver himself:  The people of Israel had forgotten that their strength came from God.  We, as the church and as individual Christians, can never afford to forget this.  Without God, they were weak and powerless, unable to deliver themselves.  Without God, and as followers of Christ that means relying on the Holy Spirit in all matters, we are weak and unable to deliver ourselves from the power of sin.  Even though through Christ we are forever saved, if we begin to rely on our own power to daily overcome sin, then we are in danger of giving in to that sin.  This would then indeed become an unnecessary burden to God.  Verse fifteen states, Neither shall he stand that handleth the bow; and he that is swift of foot shall not deliver himself: neither shall he that rideth the horse deliver himself.  Amos says that not only will their strength fail, but also the things they use to fight will fail also.  We may have come a long way from the bow and arrow and horses in battle, but all our weapons are just as useless in a battle against God.  Verse sixteen says,  And he that is courageous among the mighty shall flee away naked in that day, saith the LORD.  Even the courageous would flee from the battle with God.  Remember, these were supposedly God's people that Amos was speaking to, but they were His people in name only.  The only way that we can stand before God without fear is through faith in Christ as our Savior and Lord.  Without a personal relationship with Christ, we are still at war with God, if only by the fact of our unbelief.