We have two choices in life:
The common choice is the default position, namely we are a combination of nature and nurture.
Hopefully we have a sweet nature, now if our nurture is loving than we will be sweet and loving, if God forbid our nurture which includes all of our experiences is harsh, then he too will become harsh.
On the other hand, we have been uniquely given the ability to choose our lives!
By seeing good, you will always be sweet and loving!