Often in life if we try out a truth in our life we will find that it is true. The bible tells us to "taste and see that the Lord is good." You see if we follow God we will learn that he is good.
If we follow well we will learn that the law is not burdensome as the world says, but that his yoke is easy and his burden light..
Often we believe things will be a certain way contrary to scripture. Often it is more an expression of the gut reaction of our sinful nature than a truly logical and thoughtful approach.
We often are asked by God to trust him. We are constantly tested in life if we will trust God or not trust God.
It is always better to trust God. We often fail, but God's grace covers us. He loved us even while we were his enemies.