Being chosen by God is more than a blessing, and on the other hand it is a blessing to work in His mighty work, we are more than blessed by our Lord.
When we are chosen by our God to carry out a mission, we must fulfill and do everything that our Lord commands us, because if He commands, He will support us. Let us go and fulfill what God commanded.
8 But thou, Israel, art my servant, Jacob whom I have chosen, the seed of Abraham my friend.
9 Thou whom I have taken from the ends of the earth, and called thee from the chief men thereof, and said unto thee, Thou art my servant; I have chosen thee, and not cast thee away.
10 Fear thou not; for I am with thee: be not dismayed; for I am thy God: I will strengthen thee; yea, I will help thee; yea, I will uphold thee with the right hand of my righteousness.
Isaiah 41:8-10