Archbishop Martin paid tribute to Fr Tony Coote's 28 years of priestly ministry saying he "represented the love of God to so many who bore in their heart troubles and doubts".
55-year-old Dublin priest raised €600,000 for motor neurone disease following his own diagnosis in February 2018.
Moving memoir teaches people to find joy in dark times and to live every day in the now.
President and Taoiseach join mourners at Nicky McFadden's funeral.
