1)  Matthew 3:7-10; Unbelievers = no spiritual fruit.  Cp.  Matthew
     7:15-20; 12:33-37.

2)  Philippians 1:9-11; Believers need to learn to be fruitful.  Cf.  Romans
     1:13; Philippians 1:22; James 3:17; Colossians 1:6-10; Titus 3:14; 2
     Peter 1:8; Hebrews 13:15-16 and Galatians 5:22.

3)  John 15:1-16; God prunes the believer for more spiritual fruit.  Cf.
     Hebrews 12:11.

4)  Matthew 13:1-23; Levels of Believer spiritual fruitfulness.  Cp.  Luke
     8:15; John 12:24-26.