It is difficult, but not impossible

"...while we do not look at the things which are seen, but at the things which are not seen. For the things which are seen are temporary, but the things which are not seen are eternal." 2 Corinthians 4.18

If the person who is born of the Holy Spirit may find it hard not to heed to the lures of what your physical eyes see, imagine when you are not born of God. It is difficult, but not impossible. You really have to want it. But therein lies the secret of how to walk with God and the meaning of living by faith.

Determination

"The Lord of hosts has sworn, saying, 'surely, as I have thought, so it shall come to pass, and as I have purposed, so it shall stand.'" Isaiah 14.24

This thought teaches a secret to those who are loyal, obedient to the voice of faith: the determination in thought.
Yes, all those who are sealed with the Holy Spirit are able to think and determine what they want to happen.

Small, but unshakable

"...For assuredly, I say to you, if you have faith as a mustard seed, you will say to this mountain, ‘Move from here to there,’ and it will move; and nothing will be impossible for you." Matthew 17.20

God does not demand of us anything that we cannot do. Jesus teaches that the secret of faith is not in its size. For us to do great things, faith must be pure.