Isaiah 51

It took me 5 minutes to read this. In verse 12 God asks Israel a question regarding the source of their comfort. Don't they realize that God provides their comfort when thay need it? If we believe that same truth then why do we, myself included, fear the words and actions of other people? Don't we believe that God is able to deliver us out of every situation that we may face? Or is that just lip service?
Stuart