“And Hashem showed him a tree; and he threw it into the water and the water became sweet.”
~ Shemos 15:25

After leaving Egypt, the Jewish people wandered without water for three days. When they finally found some, it was too bitter to drink.

How did throwing in a tree help?

The Rabbis say this was a miracle within a miracle: not only did a tree sweeten water, but the tree itself was bitter.

Life has bitter periods. Trying to sweeten your problems will, at best, only cover them up. Better to accept that good solutions – like good medicines – are bitter.