ὃς γὰρ ἐὰν θέλῃ τὴν ψυχὴν αὐτοῦ σῶσαι ἀπολέσει (he/she/it will lose) αὐτήν.

ὃς γὰρ ἐὰν θέλῃ τὴν ψυχὴν αὐτοῦ σῶσαι ἀπολέσει (he/she/it will lose) αὐτήν.

For whoever desires to save his life will lose it.