St John of Kronstadt: We ought to have the most lively spiritual union with the heavenly inhabitants...

We ought to have the most lively spiritual union with the heavenly inhabitants, with all the saints, apostles, prophets, martyrs, prelates, venerable and righteous men, as they are all members o one single body, the Church of Christ, to which we sinners also belong, and the living Head of which is the Lord Jesus Christ Himself. 

This is why we call upon them in prayer, converse with them, thank and praise them.

St John of Kronstadt