Why do Christians talk about friendship with the Holy Spirit?

Christians believe that they can be friends with the Holy Spirit. The Bible teaches that, like a friend, the Holy Spirit comes along-side Christians; he shares what he has with them and encourages them to share their lives with him too.

 
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Christians believe they can spend time with the Holy Spirit; they can listen to him, learn from him and enjoy being with him. 

Because Christians believe that the Holy Spirit is good, powerful and wise they believe it truly wonderful that he comes along-side them; they think it is truly wonderful that they can be friends with the Holy Spirit.