Although the mental scope of even demigods like Brahmā was unable to comprehend the unlimited glories of the Supreme Lord, they were all able to perceive the transcendental form of the Supreme Personality of Godhead by His grace. Only by such grace could they offer their respectful prayers according to their different capacities.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
अप्यर्वाग्वृत्तयो यस्य महि त्वात्मभुवादयः । यथामति गृणन्ति स्म कृतानुग्रहविग्रहम्
apyarvāgvṛttayo yasya mahi tvātmabhuvādayaḥ | yathāmati gṛṇanti sma kṛtānugrahavigraham
SB 4.7.24