Good to hear that you are getting better and out of the flu!!! Interestingly, I bumped into a similar saying to yours, at least it reminded me of it... Making mistakes is similar as having obstacles on the road, and one F1 driver said something like... I'm learning a lot when I win, but when I lose, I learn double!
With obstacles is similar... As they are bigger, we grow more when we make it through them! They make us stronger!