This is a very interesting question, and one that is not as easy to answer as it might first seem.   What looks like a single question is in reality four.
1)     Is it possible to copy text from another website onto my own site?
2)     Is it legal for me to use text from another website on my own site?
3)     Is it ethical for me to use text from another website on my own site?
4)     Is it effective to copy text from another site onto my own site?
Is it possible to copy text from another site onto my own site?

The first question …