Nothing is quite  as humbling as the gospel. Paul drew close as Jesus continually humbled him. And through the process, He could use him more greatly, in which ever ways He saw fit. 

BIBLE VERSE References: EPHESIANS 3:8-13 | 1 CORINTHIANS 15:9 | 1 TIMOTHY 1:15 | ROMANS 1:16 | LUKE 10:2 | JOHN 4:35 | JOHN 13:3-5 | LUKE 2:49 | ROMANS 8:38-39 | EPHESIANS 6:12 | HEBREWS 2:9 | HEBREWS 1:14 | 2 PETER 2:4 | DANIEL 2:47-48 | JAMES 4:6 | JAMES 4:10 | MATTHEW 18:3 | ROMANS 5:3 | MICAH 6:8