Grieving someone that I didn't know

I just feel like writing right now. My best friend's uncle's funeral was a few weeks ago, he had cancer, stage 4. She told me he knew he was sick, but didn't tell no one, and on his last check up the doctor told him he only has 10 days to live and exactly 10 days later, he died. He had 2 daughters, and I can only imagine what those girls are feeling right now, to lose one of their parents, it must hurt to much. My best friend told me that her smallest daughter told her that she is still waiting for him to walk in and give him a kiss. When I heard that I started crying, because I wish we could realize more often how important all the people in our lives, learn to appreciate them more and enjoy every moment we spend with them. More important than love and appreciation to them is health, our health, our family's health. It's so wrong that we only appreciate health when we are sick and we take everything for granted.