If you know God you will know what He can Do.
And you know your God by the Word ( The Holy Bible).
John 14:6-7 tells us that Jesus is the way to knowing God.
Jesus saith unto him, I am the way, the truth, and the life: no man cometh unto the Father, but by me. If ye had known me, ye should have known my Father also: and from henceforth ye know him, and have seen him.
John 14:6-7 KJV