Ephesians 4:1-3 (NIV)
1As a prisoner for the Lord, then, I urge you to live a life worthy of the calling you have received.
2Be completely humble and gentle; be patient, bearing with one another in love.
3Make every effort to keep the unity of the Spirit through the bond of peace.
Romans 11:29 (NIV)
29for God's gifts and his call are irrevocable.
2 Peter 1:10-11 (NIV)
10Therefore, my brothers, be all the more eager to make your calling and election sure. For if you do these things, you will never fall,
11and you will receive a rich welcome into the eternal kingdom of our Lord and Savior Jesus Christ.