B.G 2.29
आश्चर्यवत् पश्यति कश्चिदेनम् आश्चर्यवद् वदति तथैव चान्यः। आश्चर्यवच्चैनमन्यः शृणोति श्रुत्वाप्येनं वेद न चैव कश्चित् ॥२-२९॥
Some one sees him as a marvel, someone speaks of him as a marvel, others hear him as a marvel. Yet even after such a hearing, no one knows him at all.
Gīta Tātparya 2.29
Lord is a marvel, despite knowing him as a marvel, we forget his speciality!
किं तर्हि आश्चर्यो भगवानेवेत्याह - आश्चर्यवदिति। आश्चर्यमेव सन्तमेनम् आश्चर्यवत् पश्यति न पुनः अनाश्चर्यम्।"गगनं गगनाकारं सागरं सागरोपम्" -इत्यादिवत्।
What is the marvel of the Lord? - is stated in 'āścaryavat' verse. He is the marvel, because though he is perceived as a marvel, he is not seen as one. Here the lord is compared to himself as a marvel, similar to ancient sayings - "The Sky is of the form of Sky, the Sea is of the form of Sea."
"आश्चर्यो भगवान् विष्णुः यस्मान्नैतादृशं क्वचित्। तस्मात् तद्गोचरं ज्ञानं तद्गोचरवदेव तु" -इति ब्रह्मतर्के।
"Lord Vishnu is the marvel because, like him, we can't see any other. Therefore, the knowledge that enables to see Him, only he can see." - states Brahmatarka
अनाश्चर्यवदपि असुरादयः पश्यन्तीति कश्चिदिति विशेषणम् ॥२९॥
The Lord is not a marvel, so say the demoniacal. Seeing the Lord like any other is their speciality.