Update '51-php/intro.md'

51-php/intro.md

@@ -61,17 +61,31 @@ Paul wrote this letter because he wanted to do several things.
 ## Outline
 
 1. Greeting, thanksgiving and prayer (1:1-11)
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 1. Paul's report on his ministry (1:12-26)
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 1. Instructions
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     a. To be steadfast (1:27-30)
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     b. To be united (2:1-2)
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     c. To be humble (2:3-11)
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     d. To work out our salvation, and God working in you (2:12-13)
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     e. To be innocent and light (2:14-18)
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 1. Timothy and Epaphroditus (2:19-30)
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 1. Warning about false teachers (3:1-4:1)
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 1. Personal instruction (4:2-5)
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 1. Rejoice and do not be anxious (4:4-6)
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 1. Final remarks
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     a. Values (4:8-9)
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     b. Contentment (4:10-20)