Pleasant Garden, NC -- On Tuesday, November 20th, Robert "Rocky" Smith says he will wake up and cry.
It will mark one year since his two sons were murdered by their mother and his ex-wife, Mary Ann Holder.
Guilford County Sheriff Deputies say Mary Ann Holder shot and killed her sons Dylan and Zack Smith, her niece Hanaleigh Suttles, her nephew Ricky Suttles, and family friend Makayla Woods, before killing herself.
"Life goes on, love remains, and God is there to strengthen you to make it one more day. And then tomorrow, you have to do that again, and then the next day you do that again. And the next day, you do that again. We're on almost 365 days of everyday thanking God for giving us the strength to stand," said Rocky Smith.
Rocky says it's been an unimaginably tough year, but has learned through his children's death, others have been given life. After their death, Zack, Hanaleigh and Ricky's organs were donated, saving dozens of lives.
"Twenty-three lives that we know of were saved through organ donations from heart organs, over 50 through tissue and eye," explains Rocky Smith.
Smith and his daughter, Christina Key, have met the person who received Hanaleigh's heart.
"Hana's heart actually went to somebody in Alabama and we know them, and we've met through that, and it's a 6 year old little girl who was able to live through that. I'm not going to sit here and say that I wouldn't want Hana back in a heartbeat but because she had to go, someone else was able to live," said Christina Smith Key, Dylan and Zack's sister.
Rocky and his wife Gail have started a ministry and tour talking about their tragedy. They've spoken to more than 80 groups and at each engagement, they share the importance of becomming an organ donor.
READ: FAMILY CELEBRATES THE LIVES OF SHOOTING VICTIMS
REGISTER: Become An Organ Donor