1 Peter 1:5-9 For this very reason, make every effort to add to your faith goodness; and to goodness, knowledge; and to knowledge, self-control; and to self-control, perseverance; and to perseverance, godliness; and to godliness, brotherly kindness; and to brotherly kindness, love. For if you possess these qualities in increasing measure, they will keep you from being ineffective and unproductive in your knowledge of our Lord Jesus Christ. But if anyone does not have them, he is nearsighted and blind, and has forgotten that he has been cleansed from his past sins.
The process of growing to become more like Jesus Christ includes adding all the above attributes into our lives. From the moment of salvation we are a new person that is being changed to be more like our Saviour. The last verse really jumped out at me. If anyone doesn't have these attributes, are they Christians? Yes, but they have forgotten thing that should be motivating their transformation into Christ's image. Namely, the gospel. So we find that the gospel is more than the gospel of salvation, it works transformation. If we don't have the above works of the Spirit in our lives we may be saved from hell, but we rob ourselves of the privilege of having and effective and productive life on earth.