In Matthew 17:20, Jesus said, "Nothing shall be impossible unto you"; in other words, you can do anything. The Apostle Paul lends credence to this in our opening verse. Also, in 2 Corinthians 3:5, he takes it a step further, saying, "Not that we are sufficient of ourselves to think anything as of ourselves; but our sufficiency is of God." This isn't talking about your human sufficiency or ability, but of God's ability in you; you're to look beyond yourself.
When you were born again, you received the very life and nature of God, meaning you have and are to function with divine abilities. This is what gave Paul the boldness to say, "I can do all things through Christ!" It's the same with every one of us, but many haven't been able to look beyond themselves and their seeming inadequacies hence, they concede to failure and to defeat. But not so with you; you're born of God, and therefore up to any task