Chin Chan said :

You better dont say bad to other people because at one time, the bad things will come back to you later and bite you.....also it will be more bad than what you said.

for every.....

For every good, there must be a bad. For every positive, there must first be a negative. For light to exist, there must first be darkness. For every market boom, there must first be a crash. For you to experience happiness, you must first experience sadness. For you to experience pride and inspiration, you must first experienced dissapointment and adversity. The greater the initial failure and dissapointment, the sweeter will be the pride of success.