What is the meaning of quote with what strife and pain we come into world know not?

The quote from Shakespeare's play King Lear expresses the idea that the experience of coming into the world is accompanied by struggles (strife) and suffering (pain). The speaker suggests that the process of birth is not an easy one, and that it might involve physical or emotional difficulties. The quote could also be interpreted more broadly to refer to the challenges and hardships that people face throughout their lives. This expression emphasizes that life can be difficult and that people often have to overcome a range of obstacles and difficulties in order to survive and succeed.