Philippians: the book about putting others' interests first

    Let each of you look not only to his own interests, but also to the interests of others.
(Philippians 2:4)

    But to remain in the flesh is more necessary on your account. Convinced of this, I know that I will remain and continue with you all, for your progress and joy in the faith,
(Philippians 1:24-25)

    For I have no one like [Timothy], who will be genuinely concerned for your welfare...But you know Timothy's proven worth, how as a son with a father he has served with me in the gospel.
  (Philippians 2:20-22)

    I have thought it necessary to send to you Epaphroditus my brother and fellow worker and fellow soldier, and your messenger and minister to my need, for he has been longing for you all and has been distressed because you heard that he was ill.
(Philippians 2:25-26)

For [Christ's] sake I have suffered the loss of all things
(Philippians 3:8)

    Not that I seek the gift, but I seek the fruit that increases to your credit.
  (Philippians 4:17)

And a couple references to those who seek their own interests:

    For they all seek their own interests, not those of Jesus Christ.
(Philippians 2:21)

    For many, of whom I have often told you and now tell you even with tears, walk as enemies of the cross of Christ...their god is their belly, and they glory in their shame, with minds set on earthly things.
(Philippians 3:18-19)