There are so many other words that can describe different events we go through in our life.
If we want to achieve in life I think we must go through times of testing, fire and hardship. I know that I don't learn my most valued lessons from the times I was most comfortable but from those times I felt out of place, dirty, isolated, uncomfortable, tired, etc. I am constantly amazed at the things I get to do. I am amazed at the things my body CAN do. God really gave me quite an amazing thing that I can push and stretch to unbelievable limits.
How many excuses do you make that prevent you from achieving the great things laid before you? Sure, they're hard - and you just want to throw yourself off that cliff sometimes so you don't have to trek anymore - but the view at the top makes it alllll worth it!