“For by grace are ye saved through faith; and that not of yourselves: it is the gift of God:”
For it is by grace you have been saved through faith — and this is not from yourselves, it is the gift of God — salvation (sōtēria) is by/through grace (charis) and faith (pistis), both the medium and means of salvation, neither originating from human initiative; the clause 'not from yourselves' excludes all human boasting.