Philippians 2:12-15 12 Wherefore, my beloved, as ye have always obeyed, not as in my presence only, but now much more in my absence, work out your own salvation with fear and trembling. 13 For it is God which worketh in you both to will and to do of his good pleasure. 14 Do all things without murmurings and disputings: 15 That ye may be blameless and harmless, the sons of God, without rebuke, in the midst of a crooked and perverse nation, among whom ye shine as lights in the world; 16 Holding forth the word of life; that I may rejoice in the day of Christ, that I have not run in vain, neither laboured in vain. These verses sound like salvation is by works, or at least partly by works. I know that salvation does not come by works at all. How is this explained?