John 15:15, 16

No longer do I call you servants, for a servant does not know what his master is doing; but I have called you friends, for all things that I have heard from My Father I have made, known to you. You did not choose me but I chose you and appointed you that you should go and bear fruit, and that your fruit should remain, that whatever you ask the Father in My name He may give you. 

Jesus, from the beginning, has told us the plan, the plan of God to save us and bring us into the family.  We were chosen before the earth was created and appointed to help bring about salvation on this earth. We are to bear fruit of the gospel in our lives, and that fruit is to remain with us and grow. We have so much value and potential as workers for the kingdom of God. Believe in your calling today.