Marcus Smart and the Boston Celtics are mourning the loss of the four-year guard's mother, Camellia Smart, after a long battle with cancer. The Celtics guard made the announcement on Twitter with a heartfelt letter dedicated to woman who raised him into the man and player he is today.

Here's what Smart said in the tweet:

“Mom Mother Queen Wife Sister Aunt Daughter
all these words describe your relationships with others but they do not describe who you were
you[‘re] my mom my mommy my role model my friend my glue my biggest fan and my biggest critic

you put everyone and everything before yourself
I made you a promise when I was 9 years old that I would make it and you and dad can rest
…never thought that rest would be in paradise

words can’t explain how much I love you and miss you
you’ve always taught me hold my chin up and stay strong as I’m hearing you say it while typing this
makes me cry deep inside and I feel like I’m suffocating and the person who helps me get through things [has] left me
but I know you[‘re] in a better place with no more worries no more hurt no more sadness or pain
hate to let u go but I thank god for allowing me to have one of his angles to call my mom words can’t express nor is there enough time in the world to tell u how much I love and miss u so until we meet again I say

��R.I.P.
To the strongest woman I know
Camellia Smart my mom
9.16.18”

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Condolences to Smart and his family during this difficult time.