Actor Jim Carrey credits the autistic son of his girlfriend Jenny McCarthy with teaching him how to love, reports.

Carrey spoke out during a march in Washington D.C. on Wednesday, to raise awareness of the presence of toxins in vaccines, which McCarthy claims was the cause of five-year-old son Evan’s condition.

Carrey, also accompanied by his 20-year-old daughter, Jane, said, “He taught me how to love. And without Evan I might never have seen the greatness of Jenny’s spirit. (Jenny is) the source of all that is good (in my life).”