He is very old and is yet the best in painting." In his long life Bellini saw all the changes and helped in their making.
He is the most varied and flexible painter of his time, both in manner and matter.

None could be more deeply religious than he, none more tender, none more simple, none more happy.

In manner he was equally diverse, and could paint like a Paduan, a Tuscan, a Fleming, a Venetian, and a modern Frenchman.

I doubt if he ever was really great as we use the word of Leonardo, Titian, Tintoretto, Mantegna; but he was everything else.

And he was Titian's master.
The National Gallery is rich indeed in Bellini's work.