Sri Dhar Swami wrote a commentary on Bhagavat Gita 600 years ago. He says that from a yogic perspective, slowly withdraw your mind systematically and do not slip away from that. What is Dharana? Remember the eight steps or the eight limbs of yoga. The focusing deepens into meditation and meditation deepens into samāni. Unless one is already a profound and deep meditator and a skillful meditator, mind will get distracted.