Choose rather to be strong of soul than strong of body. Pythagoras
To help another person, you do not necessarily have to be strong and rich, it is enough to be good. Source: Internet
You can't really be strong until you can see a funny side things. Ken Kesey
When will the goat be strong enough to kill a leopard. Nigerian Proverb
Who eats will be strong. Estonian Proverb
If you are an anvil, be patient; if you are a hammer, be strong. Kurdish Proverb