The difficulty in weaning the mind from objects and fixing it on God is the same as in making the river Ganges flow uphill towards its source instead of its natural flow towards the ocean.
Still, through strenuous efforts and renunciation, the mind must be trained to flow towards God, much against its will, if you want to free yourself from birth and death. There is no other way if you want to escape from worldly miseries and tribulations.
(pgs. 116-117, Mind---Its Mysteries and Control by Swami Sivananda)