There is only the One Supreme Lord God; there is no other at all. Soul and body all belong to Him; whatever pleases His Will comes to pass. (Guru Granth Sahib, 45)

He has no form, no shape, no color; God is beyond these three qualities. They alone understand Him, O Nanak, with whom He is pleased. (Guru Granth Sahib, 283)

My Lord of the Universe is great, unapproachable, unfathomable, primal, immaculate and formless. His condition cannot be described; His Glorious Greatness is immeasurable. My Lord is invisible and infinite. The Lord of the Universe is invisible, infinite and unlimited. He knows Himself. What should these poor creatures say? How can they speak of and describe You? That Gurmukh who is blessed by Your Glance of Grace contemplates You. My Lord of the Universe is great, unapproachable, unfathomable, primal, immaculate and formless. You, O Lord, O Primal Being, are the Limitless Creator; Your limits cannot be found. You are pervading and permeating each and every heart, everywhere, You are contained in all. Within the heart is the Transcendent Supreme Lord, whose limits cannot be found. He has no form or shape; He is unseen and unknown. Only Gurmukh sees the unseen Lord. He remains in continual ecstasy, day and night, and is spontaneously absorbed into the Naam. You, O Lord, O Primal Being, are the Limitless Creator; Your limits cannot be found. You are the True Transcendent Lord, forever imperishable. The Lord is the treasure of virtue. God is the One and only; there is no other at all. You Yourself are the all-knowing Lord. You are the all-knowing Lord, the most exalted and auspicious; there is no other as great as You. Your Word is pervading in all; whatever You do, comes to pass. (Guru Granth Sahib, 448)

You must understand that the Lord is near you, but He has no form or shape. (Guru Granth Sahib, 703)

Searching, I wander around searching, in the woods and other places. He is undeceivable, imperishable, and inscrutable; such is my Lord. When shall I behold my God, and delight my soul? Even better than being awake, is the dream in which I dwell with God. (Guru Granth Sahib, 816)