[Masefield]
On account of my own morality (sakena sīlena): on account of my own natural morality (sīla) of being free of longings and so on and on account of morality (sīla) through undertaking the Uposatha precepts (sīla) and so forth; it is due to the performance of these.
For this is called 'own' (sakaṃ) especially in view of the own-ness of the deeds of beings and the fact of their bringing well-being and happiness.