Ephesians 3:17-19

That Christ may dwell in your heart by faith; that ye being rooted and grounded in love, 18 May be able to comprehend with all saints what is the breadth, and length, and depth and height; 19 And to know the love of Christ, which passeth knowledge, that ye might be filled with all fulness of God.   

When we try to understand what a successful life in Christ Jesus looks like, we just need to read Ephesians.  Step 1 have Christ in your heart by faith.  Step 2 be rooted and grounded in love. Step 3 be able to comprehend the breadth, length, and height.   Step 4 to know the love of Christ. Step 5 be filled with all the fulness of God. These are the keys to overcoming in this life.