This saying is very well known in my country Venezuela, colloquially means that when you are going through difficult problems where you think that everything that life gives you is for evil you should turn it into something productive for you, hence this wonderful saying.
If life gives you lemons!! make lemonade
For me lemonade use a lemon, a glass of water and two tablespoons of sugar!
Take my lemon cut into slices and add to the glass together with the sugar and voila, come is very easy to look at the bad things from another angle.
When life is placing difficult challenges, let's demonstrate that we can do everything and soprender to life!
Happy I took my vegans !!