Consider the misfortunes of ...

Consider the misfortunes of others, and you will be the better able to bear your own.
Consider the misfortunes of others, and you will be the better able to bear your own.

Quotes from the same author

All things change; nothing perishes.
The cause is hidden. The effect is visible to all.
The essence of true friendship is to make allowance for another's little lapses.
Let your hook always be cast; in the pool where you least expect it, there will be a fish.
Chance is always powerful. Let your hook be always cast; in the pool where you least expect it, there will be a fish.