No one is expected to achieve the impossible.

To believe a thing impossible is to make it so.

Put silk on a goat and it is still a goat.

Its no use going to the goat’s house to look for wool.

By asking for the impossible we obtain the possible.

A kitchen knife cannot carve its own handle.

You can’t get blood out of a stone.

You can’t make a silk purse from a sow’s ear.

You can’t make an omelette without breaking eggs.