Technically, one does not "gain control" of the mind, but invites the Spirit of Love, which already indwells each and every mind, in the deep Unconscious, to take control. This Spirit of Love is always waiting, willing, and ready to take over whenever this is requested. Meditation/interior prayer helps this process, as it clears the mind,
allowing a higher Mind gradually to come into awareness (consciousness). Then, minute by minute, day by day, we continually surrender to this great Mind of Love. It is no "instant" or fast process, so we must be patient, but patience is one of this life's most valuable spiritual lessons.