Sentence:  In Psalm 27 : 1 you read those beautiful words which you must have in your heart if you are to master the fears that surround you , or to drive them out if they have you in their grip : `` The Lord <WSD>is</WSD> my light and my salvation ; whom shall I fear ? 
Meaning of the word marked with <WSD> tags:  be identical to; be someone or something