B.G 2.29

āścaryavat paśyati kaścidenam āścaryavad vadati tathaiva cānyaḥ। āścaryavaccainamanyaḥ śa‍r̥ṇoti śrutvāpyenaṁ veda na caiva kaścit ॥2-29॥

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 Bhāshya 2.29

The Lord, who is hard to comprehend, is seen as a marvel in the world.

dehayogaviyogasya niyatatvāt ātmanaśceśvara sarūpatvāt sarvathā anāśāt na śokaḥ kāryaḥ ityupasaṁhartum īśvara sāmarthyaṁ punardarśayati āścaryavaditi। durlabhatvena ityarthaḥ। taddhi āścaryaṁ loke। durlabhopi iśvarasarūpatvāt sūkṣmatvācca ātmanaḥ taddraṣṭā ॥29-38॥

Union and separation of the body is unavoidable. The 'ātman' is of the essence similar to Lord, without destruction ever. Hence, no need to lament. To summarize and conclude thus, power of the lord is again presented in the verse 'āścaryavat'. The word 'āścaryavat' is used to show that which is rare is considered as a marvel in the world. It is rare to come across someone who comprehends the essence of the Lord, comprehends his subtlety, and perceives him in the 'ātman'.