Every part of our being is limited. We have limitations as humans. That is our nature. We do not have the power to do everything which we want to do. So, we are limited as humans. It is only God who has unlimited abilities.
When we observe the parts of our body, we will realize that we are limited. For instance, our eyes cannot see as the eyes of the eagle. The eagle can see far and sharper than humans. The strength of the lion and some other wild beast are more than that of the humans also. So, we can see that we have limited features.
It is only God who is unlimited. God is the one who have the ability to do all things. This is a big truth. When we really understand what this means, we will understand why we should surrender the affairs of our lives to God. We need God in our lives. We cannot do all things for ourselves. We need to accept the leadership of God over our lives.