We do not become more than we are on our own, God builds us. Think of it like God's basic training, then there is another level training and another, etc. The better you get, the more you are challenged the better you become. One does not become more for themselves alone because we are all part of the body of Christ, each part needing the other to work. If one part aches another steps in and helps out a little. If we hoard those gifts, then we will never see our true rewards.