Please read A Desire for God's Glory, by Alistair Begg, at One Place.
For from Him and through Him and to Him are all things. To Him be the glory forever. Amen.
You are not acting as you ought to do when you are moved by any other motive than a single focus on the Lord's glory. As a Christian, you are "from him and through him," and so you must live "to him." Do not let anything set your heart beating so fast as love for Him. Let this ambition fire your soul; may this be the foundation of every enterprise upon which you enter, and your sustaining motive whenever your zeal would grow cold. Make God your only object. Depend upon it-where self begins, sorrow begins; but if God is my supreme delight and only object,
"To me 'tis equal whether love ordain
My life or death - appoint me ease or pain."