How to treat a friend

I'm reading a book that is a collection of imam Shafei's few lines of poetry. I hope I can capture his wise and potent words with my translation.

Here is one talking about how to treat friends (or as he refers them company on the journey of life:

إذا رافقت في الأسفار قوماً فكن لهم كذي الرحم الشفيق
بعيب النفس ذَا بصر وعلم وأعمى العين من عيب الرفيق
ولا تأخذ بعثرة كل قوم ولكن قل: هلُمّ إلى الطريق
فإن تأخذ بعثرتهم يقلّوا وتبقى في الزمان بلا صديق

If you accompany people upon a journey
then be to them as a caring kin

Insightful and aware of your own faults
and blind of your company's shortcomings

And don't account for every misstep
but say, let's keep upon the journey

For if you account for every misstep
they will become few
and you'll remain in this world without any company