Philippians 2:12 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.
When referencing Scripture, it is always helpful to have the full passage written out here. I realise this may be difficult to do from a smart phone, though.