A clear view does not equal a short distance

Today I read a quote by a Grand Canyon hiker...

"Don't mistake a clear view for a short distance."

That statement resonates with me. So many times I feel like I can see clearly where I need to go. I often, however, underestimate how long it will take to get there. This can lead to disappointment. Just because I have a vision/idea/project clearly in my mind doesn't mean it is easy to achieve.