This is true in all ways of life (Christian or not). If you plant bad seeds you will either not reap at all, or reap bad produce. If a businessman spends hundreds of dollars on drinks for his business and neglects marketing bills, his business will collapse. This is of course a modern day example. We need to make sure that our good "seeds" are things like what we do with our time and who we spend our time with.
"As I have observed, those who plow evil and those who sow trouble reap it."
Job 4:8 NIV
"A wicked person earns deceptive wages, but the one who sows righteousness reaps a sure reward."
Proverbs 11:18 NIV
What is a good seed?
What is a bad seed?
Are the things you do with your time "good seeds"?