In as much as we gleefully utilise the positive side of reality, we should also learn to accept the unfavorable side.
The blade that shapes and beautifies you can also cut and wound you.
Those who heal you can also hurt you.
The mouth that hails you can also mock you.
Those who accept you can also reject you.
Your faithful friend can also become your fiercest foe.
Situation and environment can change people, do not be overly positive, expect and prepare for the dark side of people and situations.