Jesus sais in Matthew 17:20 If ye have faith as a grain of mustard seed, ye shall say unto this mountain, Remove hence to yonder place; and it shall remove; and nothing shall be impossible unto you.
I only have a very short space here and must be very brief but hopefully I will impart enough to get you started. If not please email and I will give full discourse.
The mustard seed (as well as all seeds) has been given a commission by God. You may read this in Genesis 1:11 And God said, Let the earth bring forth grass, the herb yielding seed, and the fruit tree yielding fruit after his kind, whose seed is in itself, upon the earth: and it was so.
Genesis 1:12 And the earth brought forth grass, and herb yielding seed after his kind, and the tree yielding fruit, whose seed was in itself, after his kind: and God saw that it was good.
We also have been given a commission to go into all the world and teach all people what the Lord has taught us. But to many times we look at situations and circumstances and say "I can't do that." But if the mustard seed said that it would never sprout and come out of the ground. A mustard seed is to be planted approximately 1/4" deep in the ground. Considering the physical size of the mustard seed to the depth that translates to a depth equal to over 100 times the size of the seed. It does not say I can't push the ground away and bring forth. Once it is planted it only has one intention. To bring forth seed. That is the program that is on the inside. The Master Programmer put this program in place way back in the beginning when He said "bring forth seed."
The same way God has put a unique program (or purpose) into each one of us. We each have a "destiny" that God planned for us before the foundation of the world. If we will allow ourselves to be planted, then the program will bring forth that thing in our lives that God has before ordained. Nothing will be impossible unto us, because we will only be concerned about doing what is our program. I will not try to emulate your program (ministry), and you would not try to emulate mine. You know that you have a special calling from the Lord, as do I. When you know what God has told you to do, then nothing is impossible. God does not instruct us to do what is impossible. He does not prepare us for failure. He instructs me to do what I can do (sometimes only with His help are these things possible), and has prepared me to do what He instructs me to do.
Hope this helps. I could go on for days if allowed.