Usually when a child is born, his parents are filled with joy and it seems that they would do almost anything to save the child from the trials of life. However, even with the most well-meaning of parents, situations can arise where they can do little to help their child. In spite of their best efforts to protect him, he has to go through much hardship and pain in life, and the parents become helpless witnesses to the agony.
What is a parent to do then? Does he accept it as the result of the child's previous lives' karma? Does he bear it as an exceptional test by God? Whatever his philosophy of life, seeing his child suffer is usually unbearable for a good parent.
The only thing a parent can do in such a case, is, in my opinion, give extra love and attention to his child. It is through love that even the unbearable is tolerated with a little less pain.
Hiding his own tears, a parent has to smile for his child.