“If you compete in sports but your mind is running off in another direction, you will suffer defeat. It is the same in spiritual warfare—in this world we have to labor and not expect earthly rewards from people. If you reach your goal, which is Christ, then you will have peace, and the Kingdom of God will come for you not after you die but in this life. The Kingdom of God begins here, but in order to attain it you have to have the right measurements and know that you are not laboring for the sake of material pleasures and worldly success.”
(Metropolitan Athanasios of Limassol in pravoslaie.ru)