Adam Clarke on John 11:15

I am glad for your sakes that I was not there - "I tell you plainly, Lazarus is dead: and I am glad I was not there - if I had been, I should have been prevailed on to have healed him almost as soon as he fell sick, and I should not have had so striking an occasion to manifest the glory of God to you, and to establish you in the faith." It was a miracle to discover that Lazarus was dead, as no person had come to announce it. It was a greater miracle to raise a dead man than to cure a sick man. And it was a still greater miracle, to raise one that was three or four days buried, and in whose body putrefaction might have begun to take place, than to raise one that was but newly dead. See Joh 11:39.