WHY

Hi....
Raju was driving back to his office at 01.00 p.m. today. He saw a cycle-rickshaw driver collecting some woods and putting the same in his cycle-rickshaw. Raju soon realized that that fellow would not b capable of lifting one of the wood sheets which was quite heavy.Raju remembered what he had read in the last week, A life of A. Lincoln. He remembered how Lincoln was always eager to help others. Accordingly he also decided to help that fellow assisting him to lift that heavy wooden sheet. Doing so he got his finger injured.
Why? Was it a fruit of his good work? Was he not capable enough for doing this? Should he do such work again? What shall b an answer to this WHY?]
You better imagine yourself as Raju and work out the solution..........