A lemon is a wonderful thing until it gets into your eye.
When life gives you lemons, squirt someone in the eye.
The lemon's sourness has a singular, purifying effect.
Lemons are not oranges, but they can sometimes pretend to be one.
It is not always easy to convert lemons into lemonade.

It's the lemon juice, not the lemons themselves, that make life so sour.
Lemons are not only rich in vitamin C but also in bitterness.

A good designer is one who makes lemonade when life gives lemons.
The lemon has the same size as the mouse; but its power is much more significant.