‘Abdu’l-Baha’s answer: "Yes, it is possible. Often
people speak together without the means of tongue. There are two means of
intercourse. One the outward tongue, the other the ideal tongue. When the
spirit is in an abstract mood, when the heart is in a subjective state, then
the ideal tongue can speak, but as long as the spirit is preoccupied and the
heart is objective in its activity it is impossible to attain to that station.
Is there not a wonderful ideal union between the loved one and the beloved?
Often with a glance of an eye, with a handshake a whole world of thought is
conveyed to other side without uttering a word. It is possible to attain to
such a state of absolute, concentration if we are set aglow with the Fire of
the Love of God, if we are attracted, if we are as a burning torch, if we
overlook material phenomena and objects."
- 'Abdu'l-Baha (Words of ‘Abdu’l-Baha recorded
by Ahmad Sohrab, ‘Abdu'l-Baha in Britain, 1913’)