Are there any English idioms or famous sayings about "gain and loss"

1. It is possible to give without love, but it is impossible to love without giving. "

You must sow before you can reap. You have to pay first to get it. "

Author: robert collier

I hope you will launch a holy war in your life-dare to be your best self. "

Author: William Danvers

4. Bitterness and sweetness come from the outside, bitterness comes from the inside and comes from your own efforts. "

Author: Albert Einstein

5. More effort and more success. "

Author: euripides