God knows how vulnerable mankind is when it comes to temptations. That is why Jesus taught believers to pray God not to lead them into temptations. It's true we get tempted, but God is faithful and would not allow us to be tempted beyond what we can bear. The scenario however changes when we get ourselves into temptations. We test God when we deliberately and consciously get ourselves into avenues where we are likely to be tempted. We shall fail and this is because we have tested the Lord our God.
