Motive can be everything. Why do we do what we do? There are many good things done for private reasons. Many times people have a secret agenda tied to something they want to get.
This may seem cynical, but I have seen it time and time again. And it is one of the main reasons why people do great things in ministry and then burn out.
Lord, I want to do Your will for Your purposes. Help me to be completely sold out to You. Guide my path and help me see any dark motive or agenda within me. May I walk in fullness of faith and divine purpose. Amen!