ותשלח את אמתה ותקחה (שמות ב:ה)

The Gemara explains (סוטה יב) that the phrase אמתה means אמות – a measurement.  Her hand stretched a lot of Amos.  We must understand: if the box was so far away, why did Basya even attempt to take it? She knew she couldn’t reach it. We learn from here that when one wants to do good for others or perform a mitzvah, even though it seems impossible, one should attempt to do what he can, and Hashem will help with the rest.  Because Basya wanted to perform a mitzvah, a miracle occurred: Her hand-stretched and reached the box containing Moshe.