Inspiration and Perspiration

What is inspiration and where does it come from? Everyone will answer that question differently. For some it's internal, for others it's external, or maybe a combination of the two. We are all unique and find our inspiration in different places at different times and for different reasons.
My inspiration comes:
walking: can be in nature or urban setting, but focus on what's around,
reading: choosing a random book or subject ~ downloading books from the London Public Library is great option,
and listening: conversation, the most important part of communication is listening. 

I borrowed the book "The Hidden Life of Trees" from a friend. It took quite a while to read. For me, it was too technical in places, but in the end... Trees are alive. They think. They feel. They communicate. That's where the inspiration started. For the last couple of months I have been observing and thinking about trees more. I have done a couple of sketches, but it's really just the start. I am not sure where this will take me....

An interesting read:  "Why Inspiration Matters" from Harvard Business Review.