Read Romans 11:18 Using Other Translations
Boast not against the branches. But if thou boast, thou bearest not the root, but the root thee.
do not be arrogant toward the branches. If you are, remember it is not you who support the root, but the root that supports you.
But you must not brag about being grafted in to replace the branches that were broken off. You are just a branch, not the root.