In the book “God Talks With Arjuna” Paramahansa Yogananda translates the Bhagavad Gita and on page 603 we find:

“Deeply meditating disciples should concentrate on their guru, or meditate with him if possible. Those who are spiritually advanced do in fact meditate with the guru by visualizing him in the spiritual eye and tuning in with him, whether or not they are in his physical presence. During meditation the spiritual vibration of a great master silently works on lesser yogis who may be meditating with him or who are in tune with him regardless of distance. It is sufficient for a disciple to think strongly of his guru before meditation. He will then find his meditation on God to be reinforced by the Lord’s power flowing through the direct, tangible channel of the guru.”