Seraphim: Saint or No Saint?

St. Seraphim of Sarov was canonized by the Russian Orthodox Holy Synod in 1903. His reputation on Earth and from heaven is similar to the Catholic saints John Vianney or Padre Pio. Catholics who follow the Russian usage of the Byzantine rite regularly venerate him, and St. John Paul II referred to him as a saint in his book interview Crossing the Threshold of Hope. 

So although he has not been canonized according to the canonical process of the Roman Church, his veneration may be compared to that of other saints of Russia; for example, St. Sergius or Sts. Boris and Gleb, who are venerated in the Roman martyrology without having been formally canonized.