Romans 11:20-22 New Revised Standard Version (NRSV)
20 That is true. They were broken off because of their unbelief, but you stand only through faith. So do not become proud, but stand in awe. 21 For if God did not spare the natural branches, perhaps he will not spare you.[a] 22 Note then the kindness and the severity of God: severity toward those who have fallen, but God’s kindness toward you, provided you continue in his kindness; otherwise you also will be cut off.