Colossians 4:5 (NIV) Be wise in the way you act toward outsiders; make the most of every opportunity.
Galatians 6:10 (NIV) Therefore, as we have opportunity, let us do good to all people, especially to those who belong to the family of believers.
Revelation 3:8 (NIV) I know your deeds. See, I have placed before you an open door that no one can shut. I know that you have little strength, yet you have kept my word and have not denied my name.
When one door closes, another opens; but we often look so long and so regretfully upon the closed door that we do not see the one which has opened for us. —Alexander Graham Bell
Leadership, Vol. 10, no. 1. Elesha Hodge, comp., Today's Best Illustrations – Volumes 1-4, (Carol Stream, IL: Christianity Today, 1997), WORDsearch CROSS e-book, Under: "OPPORTUNITY".