Bhagavad Gita Chapter 11 - Viswarupa Darasana Yoga - Sloka 20

The entire content of this mail is from Swami Adidevavananda's translation of The Ramanuja Gita Bhashya, published by Ramakrishna Mission

The Cosmic Vision Defined 15-31

1 Gita Sloka  every day - Chapter 11 - Viswarupa Darsana Yoga - Sloka 20

Srivilliputtur - Andal & Rangamannar

Dyava prithavyoh idam antaram hi vyaptam tvaya ekena dishah cha sarvah I

Drishtva adbhutam rupam ugram tava idam lokatrayam pravya thitam mahatman II sloka 20

द्यावा प्रिथव्योः इदं अन्तरम् हि व्याप्तं त्वया एकेन दिशः च सर्वाः  I  

दृष्ट्वा अद्भुतम् रूपं उग्रं तव इदं लोकत्रयं प्रव्यथितं महात्मन् II श्लोक 20

This space between heaven and earth and all the quarters are filled by you alone. Having seen this, your marvellous and terrible form, the three worlds are trembling with fear, O Mahatman.

The term "heaven and earth" imply all the upper and lower worlds.The antara or that between heaven and earth, denotes the space between them in which are located all the worlds. You alone pervade all the space and all the quarters. 

"Beholding your marvellous and terrible form" beholding your form of infinite length and extent, marvellous and terrible, the three worlds are trembling. Gods headed by Brahma, the asuras, the manes, the Siddhas, the Gandharvas, the Yakshas and Rakshasas have come with a desire to see the battle. All the "three worlds" consisting of these friendly, antagonistic and neutral beings are extremely frightened. 

"Mahatman"  means one, the dimension of whose mind has no limits. It has to be undestood that like Arjuna, other beings also were granted by the Lord, the divine eye capable of perceiving the form which supports the universe. If it be asked why, the reply is that it was for demonstrating to Arjuna His sovereignty. Hence it is stated here :  "Beholding your marvellous and terrible form, the three worlds are trembling with fear, O Mahatman.