This quote convey a deep meaning that forgiveness should not be a choice it is a necessity for humans . Because if we don’t forgive how we Live people live rest of thier life carrying the  burden of anger ,dissatisfaction and hatred but who suffer from that both will suffer from that if a person truly loves you cares about you . To them your forgiveness matter . If you don’t forgive the person you will suffer from inner pain anger and hatred but forgiveness should not be a choice it should be a attitude because
Relase burden from your heart :

When we forgive someone we release the burden of hatred and self punishment from our shoulder because we are cursing ourselves to trust that person love them

Improves relationships

By forgiving eachother we are boosting our connection with the person because if we forgive someone they think that we understand them we understand their situation and sometimes a small incident like not forgiving some break relationship in one blink

Improve mental health and shape positive mindset

you understand that they are also humans in my perspective forgiving everyone is important because if I m not forgiving someone I m selfish because when I do something like that I will feel no one understands me and forgiving everyone will shape your thoughts and morals and you will develope a positive mindset. We all are humans all make mistakes we all deserve forgiveness so forgive everyone