In salvation we come to the cross, but in discipleship we carry the cross.
For salvation we believe in Jesus, but for discipleship we follow Jesus.
At salvation we sip the milk of God's word, but for discipleship we chew the meat of God's word.
At salvation we are indwelt by the Spirit, but in discipleship we become intimate with the Spirit.
Salvation is instanteous, discipleship is ongoing.
At salvation we leave Egypt, but in discipleship we enter the Promised Land.

"Therefore leaving the discussion of the elementary principles of Christ, let us go on to perfection" Hebrews 6:1