“Jesus looked at them.
It is impossible,
But not for God.
All things are possible
ἐμβλέψας αὐτοῖς ὁ Ἰησοῦς λέγει Παρὰ ἀνθρώποις ἀδύνατον, ἀλλ’ οὐ παρὰ θεῷ· πάντα γὰρ δυνατὰ παρὰ τῷ θεῷ.
This saying about the power of God and the impotence of humans can be found in Matthew, chapter 19:26, and Luke, chapter 18:27, but slightly different. Mark said that Jesus looked at them (ἐμβλέψας αὐτοῖς ὁ Ἰησοῦς). Then he told them (λέγει) that this would be impossible for mortal men (Παρὰ ἀνθρώποις ἀδύνατον), but not with God (ἀλλ’ οὐ παρὰ Θεῷ). All things were possible with God (πάντα γὰρ δυνατὰ παρὰ τῷ θεῷ), since he could do everything. This could be an allusion to Genesis, chapter 18:14, when Sarah laughed when she was told she was going to have a son or the prophet Jeremiah, chapter 32:17, when he was talking about creation. What humans were not able to do, God was able to do because he was an all-powerful God.