Friends

If you lie down with dogs, you will get end up with fleas! Everyone knows that human characters we are contagious  social creatures and it’s it is important to have find some helpful real friends. What is the most important character of a friend attribute of a true friend? We all have different criteria but I personally value the honesty above over all others.

Western people saying, "Truth is a hard pill to swallow"1. There is a similar idiom one in Chinese: "Faithful words offend the ears, good medicine tastes bitter. (Chinese medicine is a concoction made from herbs and is often is unpalatable.2) Likewise, an honest friend will always encourage you to face your shortcomings instead of resorting to flattery no matter how even when they know the truth will hurts. When you are prosperous 3 rich, the friend keeps silent beside you at your side while as others crowd around you heaping praises upon you4; whey when you are frustrated down, he gives you a hand timely hand as others melt fade away. Unfortunately, honest friends are always as rare as blue diamonds5 on the earth.

1.  Alternatively, "Truth is a bitter pill to swallow"

2.  Unpalatable is a good word but I think it's too formal.  I prefer the phrase, "nasty tasting".

3.  Personally I prefer rich.  That's all.  Prosperous sounds too pompous here.

4.  Your sentence is rather weak.  So I am strengthening it.

5.   Technically incorrect.  Diamonds are quite abundant on Earth.  Just look at the diamond industry.  However blue diamonds are indeed rare, followed by red and green is the rarest of them all.