To the chief Musician for the sons of Korah, A Song upon Alamoth. God is our refuge and strength, a very present help in trouble. God is our refuge - It begins abruptly, but nobly; ye may trust in whom and in what ye please: but God (Elohim) is our refuge and strength.
A very present help - A help found to be very powerful and effectual in straits and difficulties. The words are very emphatic: עזרה בצרות נמצא מאד ezerah betsaroth nimtsa meod, "He is found an exceeding, or superlative help in difficulties." Such we have found him, and therefore celebrate his praise.