Elder Packer does a great job of teaching us about the importance of serving in the church and of sustaining others - weaknesses and all.  The Lord promises that the weak and simple will be able to help in his work if we have faith in him and follow the Spirit.  I have seen many times in my life where I have been inadequate for a calling and the Lord has helped me overcome my weaknesses and fulfill what the Lord has asked me to do.  I invite each of you to have faith and commit to accept and magnify the callings extended to you.