But unto the obtaining of salvation through our Lord Jesus Christ (alla eis peripoiēsin sōtērias dia tou Kuriou hēmōn Iēsou Christou). The difficult word here is peripoiēsin which may be passive, God’s possession as in 1Pe 2:9, or active, obtaining, as in 2Th 2:14. The latter is probably the idea here. We are to keep awake so as to fulfil God’s purpose (etheto, appointed, second aorist middle indicative of tithēmi) in calling us. That is our hope of final victory (salvation in this sense).